At the first launch, I got a bug on the boss, it just flew to the right and flew there (played the archive version):
On the second launch, it went without problems. The number of lives can be as follows: 177/172 (the maximum has not increased for some reason). Cubic decorations that run along the walls, as it turned out, are decorations that you can fly through, although they have the texture of walls that are not passable - this is inconvenient.
In general, it is played dynamically, well, the music and graphics are pleasant.
Good luck in development =)