Thank you a lot! I'm sorry to hear about those issues on IOS, maybe there is a way to block that using javascript or something, I should check that
I think it's possible to have a pretty smooth ride in a lot's of case, but as you don't know the level before you it's hard to do it in practice. Playing the seeded level is a bit more interesting as you start to find skips in the levels and ways to keep your speed. Putting pre-made sections could be great for a larger version, but then I would have to actually make do some level design, which is not easy for me :D
For the colours of the circles, yeah I wanted to but didn't have the space to make something more complex. Changing the colour according to circle size is a pretty cool idea tho