Also a skill issue here! I probably ran through 10 restarts, haha.
I think that this is a well-made, standard platform game. It feels right, the level is challenging. You absolutely cannot make mistakes. I do think, though, that SkySprint doesn't feel different from most other platformers, and I think that is largely due to using stock sprites and sounds. I think the game that you have now works well, but it doesn't feel particularly unique or special, which will help you stand out in future projects.
I did enjoy my 10 playthroughs!