Thanks for the feedback.
I agree about the ability to adjust the volume, and regarding the controls, they were exactly like that at first. But there were a few issues:
1) The player needed to appear in the right position at the start of the game, but I couldn't figure out how to position the mouse there.
2) Some mechanics, like the wall, I couldn't implement.
These two points are due to the engine; I don't know how to do it, or if it's even possible.
3) The player was too fast, and at the beginning, while the obstacles were far away, it was possible to quickly go quite far.