Prompt Packs

Add a player character that moves left and right with the arrow keys at 240 pixels per second. Use a colorful rectangle for now — we'll add art later.

Add gravity (1500 px/s²) and a jump on Space. The jump should feel snappy: jump velocity around -600. The player should land on the ground at the bottom of the screen.

Make the jump variable height: if the player releases Space early, cut the upward velocity in half. This should feel like Mario.

Add 100ms of coyote time after walking off a platform so jumps still register. Also add a 100ms jump buffer so a jump pressed slightly before landing still fires.

Add 4 solid rectangular platforms at different heights the player can land on. Collision should resolve from the top, sides, and bottom correctly.

Add a horizontal moving platform that slides between two points over 3 seconds. The player should ride it when standing on it.

Add a one-way platform the player can jump up through but lands on from above.

Add wall sliding when the player is airborne and pressing into a wall (slow fall, 200 px/s). Pressing Space while wall-sliding launches them away from the wall at -500 vertical, 400 horizontal away from the wall.

Give the player one mid-air jump. Reset it when they touch the ground. Make the second jump a bit weaker (-500 vs -600) and play a small particle puff.

Add a Shift-key dash that moves the player 200px in their facing direction over 150ms, ignoring gravity. 1 second cooldown. Show a small trail behind them during the dash.

Add a camera that smoothly follows the player horizontally with easing. Keep the player in the left third of the screen when moving right.

Add lava at the bottom of the screen. If the player touches it, fade to black over 300ms and respawn them at the level's start position.

Add an enemy that walks back and forth between two points at 80 px/s. If it touches the player, the player loses a life.

Make the patrolling enemy turn around at platform edges instead of walking off, by checking if there's ground in front of it.

If the player lands on an enemy from above (downward velocity), the enemy dies in a poof and the player bounces (-400 velocity).

Add a slime that slowly chases the player horizontally at 60 px/s when within 300px. Outside that range, it idles.

Add a stationary turret that fires a projectile at the player every 2 seconds, but only if the player is on the same horizontal level and within 500px.

Add an enemy that fires a missile that slowly tracks the player for 3 seconds before self-destructing in a small explosion.

Add a bat that floats in a sine-wave pattern across the screen, ignoring gravity. Speed 120 px/s, wave amplitude 40px.

Add a bull enemy that pauses, paws the ground for 1 second (telegraph!), then charges in a straight line at 400 px/s until it hits a wall.

Add a nest that spawns a new small enemy every 4 seconds, up to 3 alive at a time. Destroying the nest stops the spawning.

Give enemies 3 HP. When hit, they flash white for 100ms and get knocked back. They die on 0 HP with a burst of particles.

Add a large boss with 30 HP that hops toward the player every 2 seconds. Camera shake on each landing.

When the boss drops below 15 HP, it enrages: hops twice as fast and shoots 3 projectiles in a spread on every landing. Turn its color red.

Add a title screen with the game's name in a big arcade font, a 'Play' button, and a subtle animated background of slowly drifting stars.

Pressing Escape pauses the game and shows a 'Paused' overlay with Resume and Quit buttons. The game state freezes completely while paused.

Add a heart-based health bar in the top-left. 3 hearts max. When the player takes damage, the lost heart pulses then fades to empty.

Add a score counter in the top-right that animates rolling up to new values over 300ms when score increases.

Add a small coin icon next to a coin counter in the HUD. When a coin is collected, the counter shakes briefly and a +1 particle floats up from the coin.

When the player takes damage, flash a red vignette around the screen edges that fades out over 400ms.

When an enemy is hit, show the damage number floating up from the impact point and fading over 600ms.

Add a contextual key prompt that appears above the player the first time they're near something interactive: 'Press E to open'.

Add a dialog box at the bottom of the screen that types out text one character at a time at 40 chars/sec. Press Space to skip to the end of the line, then again to advance.

Add a 4x4 inventory grid that opens with Tab. Slots show the item icon and count. Hovering a slot shows a tooltip with the item name and description.

Add a settings menu with sliders for Music Volume, SFX Volume, and a toggle for Screen Shake. Persist these settings in localStorage.

When the player dies, fade to a Game Over screen showing final score, best score, and Retry / Main Menu buttons. Save best score to localStorage.

Add a score that goes up by 10 every time the player collects a coin. Show the score in the HUD.

Add a combo counter that increases by 1 every time the player defeats an enemy within 2 seconds of the last one. Points earned during the combo are multiplied by the combo count.

Show a thin bar under the combo counter that visually drains as the combo timeout approaches. When it empties, the combo resets to 1.

Add two currencies: Coins (common) and Gems (rare). Coins drop from enemies, Gems drop only from bosses or hidden chests.

Add player XP. Defeating enemies grants XP. At 100/250/500/1000 XP, level up. On level up, flash a big 'LEVEL UP!' banner and play a triumphant sound.

On level up, let the player pick one of three upgrades: +1 max health, +20% move speed, or +25% damage. Apply the upgrade immediately.

Each level has a star rating: 1 star for finishing, 2 stars for finishing under 60s, 3 stars for finishing without taking damage. Show earned stars on the level-complete screen.

After a run, show a summary screen: time, enemies defeated, coins collected, deaths, and final score with each line counting up one-by-one.

Save the top 10 high scores to localStorage with a name (3-letter arcade-style input) and date. Show them in a Leaderboard menu.

Add a 'Daily Challenge' mode that uses today's date as a random seed so every player gets the same level layout. Track best daily score separately.

Add 5 achievements: First Blood, Combo x10, No-Hit Level, Speed Demon (under 30s), and Collector (all coins). Pop a toast in the top-right when one unlocks.

After death, convert remaining coins to 'Soul Shards' (1 per 10 coins). Soul Shards persist between runs and can be spent in a hub on permanent upgrades.