Runnelry

A blueprint board, a dropper and a gold cup. Build a little machine from a limited kit so that all three marbles end up in the cup, then press Drop and watch it run. Marbles roll, bounce and collide with real circle physics, so a ramp tilted fifteen degrees too far sends them flying past.

Each of the six parts behaves differently: ramps guide, funnels gather, bumpers kick, see-saws tip under weight, trampolines throw and fans blow marbles sideways in mid-air. When the puzzles are done, the sandbox gives you every part without limits.

• 15 contraption puzzles: each checked solvable, from a single ramp to a six-part grand machine
• Six parts: ramp, funnel, bumper, see-saw, trampoline and fan, all rotatable in 15 degree steps
• Stars for fewer parts: hit the par to earn three stars
• Red zones: some spots cannot be built on, so the obvious answer is not always allowed
• Saved sandbox: up to 40 parts, a movable dropper and marbles on demand
• Keyboard or touch: drag and drop, or build entirely with keys

Code and text written with AI assistance; checked by PN Scripts with automated tests. Every shape is drawn and every sound synthesised by code; there are no AI-generated image or audio files.

Controls

• Drag a part from the kit onto the board; drag placed parts to move them, drop them on the kit to remove
• R / E: rotate clockwise, Q: rotate back (or the buttons)
• 1-6: add a part at the cursor, arrow keys / WASD: move it (Shift: fine steps)
• Tab: select the next part, Space: select / release, X: remove
• Enter: drop the marbles / stop, L: level select
• P / Esc: pause, M: sound

Made by PN Scripts.