None of the ui seems to work except for starting the game. It's possible to turn the camera enough to see the bounds of the skybox and the whitespace outside of it. I saw quite a few visual artifacts underwater, I'll post a screenshot below of what I mean.
Boosting definitely needs a lot more "oomph" beyond the lightning effect. I don't feel much faster whenever I use it. The modern Sonic games like to zoom out the camera bit at higher speeds to cheat the effect.
It's possible to avoid sinking into the water by spamming the jump button as soon as you touch the surface. Not sure if that's intentional.
Controlling the camera can be pretty awkward at sharp turns and loop de loops.
I got filtered by the ramp jumps so if there's more level beyond the first checkpoint I wasn't able to explore it lol.
Hope I don't come across too negative here, I like what you have so far and look forward to how it develops. If you haven't already played it, Spark the Electric Jester 3 is a great game to look at for inspiration.
