As a lot of ppl commented on, the controls are a bit hard to learn (too many things to do in a short time frame).
Once you're stuck on a flat surface it's nearly impossible to get out. I guess you have to memorize where those flat surfaces are and avoid them ahead of time on the next run.
The extremely limited energy is a good take, and provides an unique challenge, compared to other "diving deeper and avoid obstacles" games. I really liked that.
Some music would be great. Also sound effects/particles when you boost or hit something would make the game feels much better.
Overall, a fun game to play. Notice that it's your first game, you did a great job. Well done!