I really like the color palette of your game, the cool tones feel very pleasant to the eyes.
The models kinda remind me of Half-Life and Garry’s Mod, and the main mechanic is really fun — changing the cube’s size to help yourself progress.
Hope my suggestions below can help you a bit:
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There’s a big issue I noticed — the door can be passed through directly . It’s almost like cheating for us players. I didn’t even need to press the button to open it, I could just walk straight through. Maybe fix that so we can’t skip it, otherwise we’ll miss a lot of the fun mechanics you made.
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It would be nice if there’s an option to skip the guide text, like pressing R to skip or something. I kinda missed the instruction in front of that size-changing gun and it made me confused later . At the start my attention was more on the visuals, so having a skip or replay key would make the experience smoother.
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About the power-off part, where the jumping platforms are (with that black box): maybe make the platform just a bit larger? When I try to resize the black box, I often have to lift and drop it a few times to get it right in position. The platform feels a bit too small for turning around. Maybe you did it on purpose to make it harder (just guessing tho ).below!

Overall, I really like the mechanic, the background, and the whole vibe of the game. Keep it up, it’s a really cool idea!
