Hey! I tried your demo and want to say a few things. First of all, i really dig the idea and the movements, the mechanics are really unique and the limited movement we are given. I also really like the vibe and overall feel of the game. Here are some things i noticed.
For the design, I love the main menu and the aesthetics. Especially how the gravity works!
In terms of performance, I was running the game with my computer ( i7 11th gen, rtx 3060 ) at 180 fps average so i can't really say much in terms of the performance since i have a pretty high-performance PC so the game was running smoothly for me and I didn't come across any bugs in my playthrough.
I managed to finish all the level, but i was stuck at some level for way too long before i can figure out the solution (i'm prob just dumb). A tutorial / hints / tips that explain the mechanics would help tremendously (If you're in progress of making these then Nice!).For example, At first i assumed the yellow crystal can't be turned off from shooting it twice resulting in me being stuck in level 8 for way too long.
It's a very cool game and i love the puzzle design ( especially the green plants ).
You did an awesome job man! Can't wait for further updates.