RBS CODE · PROJECT CHOOSER
20 Game Recipes
Click HTML, CSS, JavaScript or Result. Nothing is hidden backwards anymore.
All games use
game-tools.js. Put it in the same folder, then place <script src="game-tools.js"></script> before your own JavaScript. The Result tab injects it automatically.Student JS lines ignores blank lines, comments and lines that are only closing braces. It is a rough measure of how much meaningful game logic the student reads/writes.
JS3
1. Move the Robot
NEW: Reusable keyboard movementTOOLS: moveWithKeys, keepInside6Student JS lines
Easy upgrades:
Change speed 15 → 30Use WASDAdd a finish target
JS3
2. Coin Collector
NEW: Collision + score + randomTOOLS: moveWithKeys, touching, changeNumber, randomPosition12Student JS lines
Easy upgrades:
Win at 10Coin worth 5Add a trap
JS3
3. Treasure Rush
NEW: Treasure + danger + win ruleTOOLS: touching, randomPosition, changeNumber, setText9Student JS lines
Easy upgrades:
Move the trap20-second timerGold gem worth 5
JS3
4. Key + Locked Door
NEW: Remember game state with true/falseTOOLS: touching, hide, setText11Student JS lines
Easy upgrades:
Two keysFake keyDoor opens level 2
TIMERS
5. Dodge!
NEW: Visible game loopTOOLS: move, randomX, atEdge, touching9Student JS lines
Easy upgrades:
Speed 7 → 10Add survival scoreAdd another rock
TIMERS
6. Road Racer
NEW: Falling trafficTOOLS: move, randomX, atEdge, touching9Student JS lines
Easy upgrades:
Count cars passedFaster every 5 pointsTwo enemy cars
TIMERS
7. Timed Treasure Rush
NEW: CountdownTOOLS: startCountdown + JS3 core11Student JS lines
Easy upgrades:
10-second sprintTrap removes timeBonus gem
TIMERS
8. Monster Chase
NEW: Enemy follows youTOOLS: moveToward, touching6Student JS lines
Easy upgrades:
Monster speed 2 → 4Collect gems while escapingSafe zone
ARRAY + LOOP
9. Maze Escape
NEW: Many wallsTOOLS: moveIfClear7Student JS lines
Easy upgrades:
Key inside mazeTimerMoving enemy
ARRAY + LOOP
10. 3 Crystals → Mystery Key
NEW: Inventory + tradeTOOLS: countItem, removeItems, findTouching15Student JS lines
Easy upgrades:
Door that needs gold key4 crystals but only need 3Different trader prices
ARRAY + LOOP
11. Potion Ingredient Quest
NEW: Different quest itemsTOOLS: hasAllItems, findTouching13Student JS lines
Easy upgrades:
Two potion recipesRare ingredientPotion opens a path
JS3
12. Mini Shop
NEW: Gold economyTOOLS: changeNumber + if14Student JS lines
Easy upgrades:
Buy speedBuy livesPrices change
ARRAY
13. Story Quest: Locked Village
NEW: NPC quest stateTOOLS: touching, hide, setText12Student JS lines
Easy upgrades:
More NPCsChoice of routesSeveral quest stages
JS3
14. Two-Player Race
NEW: Two control setsTOOLS: moveWithKeys, touching7Student JS lines
Easy upgrades:
Maze raceMoving finishBest of 3
JS3
15. Two-Player Treasure Battle
NEW: Shared target + two scoresTOOLS: moveWithKeys, touching, randomPosition, changeNumber13Student JS lines
Easy upgrades:
First to 10Trap steals a pointBonus treasure
SMOOTH KEYS
16. Pong
NEW: Hold keys + bouncing speedTOOLS: trackKeys, keyDown, move, touching, atEdge15Student JS lines
Easy upgrades:
Add scoreBall speeds upSmaller paddles
PLATFORMER
17. Platform Escape
NEW: Gravity + jump + platformsTOOLS: trackKeys, keyDown, applyGravity, standingOnAny, landOnPlatforms12Student JS lines
Easy upgrades:
Coins on platformsMoving platformsEnemies
DOM+ / ARRAY
18. Space Defender
NEW: Create and move bulletsTOOLS: createSprite, findTouching, move19Student JS lines
Easy upgrades:
Score hitsAliens moveEnemy bullets
ARRAY + LOOP
19. Dungeon Key Maze
NEW: Maze + inventory + locked doorTOOLS: moveIfClear, touching, hide14Student JS lines
Easy upgrades:
Several keysTreasure roomsMonster patrol
ARRAY + LOOP
20. Rescue Mission Story Game
NEW: Multi-item questTOOLS: hasAllItems, findTouching, setText14Student JS lines
Easy upgrades:
NPC cluesShop for foodTimed final escape