I downloaded the Steam demo, and I hope it is the same.
This is pretty fun. I found the witty instructions funny, and I had a good time- for the time I spent playing, however, I do have some light critiques and ways that they might be worked on. I should preface this with the disclaimer that though I believe my proffered solutions to be simple, They may not be.
My biggest complaint is with the wheel. The long corridor means that it is quite common for a ball to be headed down towards a spin, only for it to be sniped (without a card) immediately after.
For this, I could see a few possibilities:
A que: If two colors get a spin right after each other, a que could form. Perhaps with a 10 second cool-down buffer between entries to stop it from stacking up too far...
A consolation spin for if a ball is already halfway down the corridor, maybe with only a few cards, like a shield, an extra ball, or something that could break someone *else's* cannon.
Something to stop consecutive spins for one color. I played two games against the bots, and both times, I lost because one color was consistently getting a majority of *all* spins.
Individual spinners- each color has its spinner off to the side.
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The only other notable difficulty I noticed, was that the game can feel a bit slow at times. Perhaps an option to speed up the physics or gravity?
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Aside from that, it was a good game. I"d love to be able to adjust the arena size or have custom cards in the paid version, but so far, I am very interested in this project.