Our playing guide
Prismhorn · How to play
Prismhorn makes every shot a fan of rainbow bands with different effects. Growing flowers generates Light, but the same growth can strengthen nearby blight. You aim all bands together and keep progression when you return to the Prism.
Controls
Enter starts, arrows/WASD move, Q/E adjust the fan and Space flares. Use 1–6 at the Prism to buy upgrades; touch buttons are included.
Rules & goal
- Enter the valley and move while aiming the rainbow through your position and direction.
- Q/E changes the fan width; Space spends vigour on a stronger flare.
- Bring Light to the Prism and use the numbered upgrades to unlock more bands and improve the run.
Beginner tips
- Growth and healing can benefit an enemy as well as a friendly object. Read the band descriptions.
- Adjust your angle so a useful band hits its target without feeding nearby blight.
- Progress saves locally. The upstream author discloses AI assistance in its code and procedural art.
Progress & devices
Play in a desktop or mobile browser using the controls above. Some games save only in the current browser; clearing site data can remove saves. Pause when stepping away. Reloading is not guaranteed to preserve the current round.