Nice execution of the game idea on this one, the game plays well and I could complete all available levels, wanted more, and that's always a good sign. The cube is anything but friendly though 😅, always tried to screw me over and fall out of the block.
For improvement you could add an indicator for when the other wall that comes down will occur; that'll add some tension, that sense of incoming peril, which could make the game more fun.
Overall great stuff. 💯