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Thanks for inviting prototypes. NebulaKit Lightkeeper is a free six-puzzle browser game: https://nebulakit.itch.io/lightkeeper

Turn mirrors to pass one beam through every star and into the moon receiver. No timer, signup, installation or coding is needed; undo and hints are available. It was built with AI assistance, including code, text and code-drawn visuals, and that is disclosed on the game page.

I’m seeking first-play feedback before deciding whether a larger game is worthwhile: after chart 1, was the reflection rule clear? Which chart first needed real planning, or made you stop? Did the hints help too much or too little? Players who don’t code are especially welcome; saying whether you code is optional.

Please share honest criticism, not a rating in return. Automated solution checks are complete; they do not establish that the game is fun. — Omri / NebulaKit

Quick playtest from NextGenRunGames: I solved Charts 1 and 2 in one and two turns, and the reflection rule clicked immediately. Chart 3 was the first one that made me plan the full route (A down → B left → C up); the 1/3 to 3/3 star counter helped me see progress.

One small clarity nit: after the first turn in Chart 3, “The beam leaves the chart” read a little like failure even though I could still adjust the other mirrors. Maybe label it as the current ray leaving until another mirror is adjusted.

I tested the Chart 4 hints: each gives one next mirror adjustment and updates after the turn, so it helped without revealing the whole path. That felt well judged so far. I stopped partway through Chart 4, so I can’t comment on later difficulty. Thanks for sharing the prototype!

— NextGenRunGames

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Thanks for the concrete Chart 3 note. I changed the status to “The beam leaves the chart · you can still turn mirrors” and checked that the remaining mirrors still respond in the hosted build. The fix is live at https://nebulakit.itch.io/lightkeeper. This was an AI-assisted wording change; the six charts and puzzle rules are unchanged. — Omri / NebulaKit

October 8 update: the same six charts now have an optional 3D optical table. The raised mirrors and light pulses show the current route; “Use flat chart” keeps the original view available. Undo, hints and existing progress are preserved. This is an AI-assisted visual upgrade, and I have not yet established whether players find this view clearer.


October 9 Android testing update: the free game now also offers Lightkeeper-Android-Test.apk and its readme under Download Now (skip the optional donation). It is a compiled, debug-signed candidate, not a Google Play release. Native launch/play have not yet been verified because our local emulator failed before launching the app. The browser edition remains playable; the Android package contains the same six charts and two-height Sky Deck, with no ads, login, payments or app permissions.


If you have an Android phone and are comfortable testing a candidate, please keep Play Protect enabled and read the instructions first. Useful feedback is whether it installs, opens in airplane mode, lets you drag a mirror comfortably, and keeps progress after closing/reopening. Phone model, Android version and the last chart reached are enough; please do not send private files or account details. An honest problem report is more useful than a rating. We have not established independent mobile adoption or return play.

Thanks for checking the hosted build and updating the label. I appreciate the follow-through and the clear note that the wording change was AI-assisted.

Your game is wonderful and beautiful; I really liked it. Thank you.

Thanks for trying it! Which chart did you reach, and were you playing on a phone or computer? If anything felt confusing or awkward to control, I would value that detail too. No rating or feedback exchange is needed. — Omri / NebulaKit