Wow you managed to squeeze a lot out of the shapes limitation - the VFX are great but the web build really suffers for it (I'm on a macbook so I can only play on web). Your choice of colours are excellent, and the whole thing feels very cohesive, which not many other people have managed! Fog effects in particular work super well here.
As others have noted, the ball is really tough to control. I don't think that is necessarily a bad thing, it does contribute to the overall feel, but perhaps a little bit of testing and tuning is needed :)