Congratulations on the artistic section, it looks impressive!
I like it a lot and it seems very professional to me how the opening of the game is made and the transition when you hit the Start button. By the way I think the Start button is always "selected" because it doesn't change the animation.
Within the gameplay, it seems to me that the clouds are very well achieved, although sometimes a certain popping is noticeable.
When the two towers spawn, I would make them much slower for two reasons:
- The player may not be looking at the moment
- It takes a long time to arrive.
Being an experimental game you could test the idea that the towers appear as the player gets closer, that is, interpolate the height of the towers with the distance from the player.
<Inanis Homo Spectas>