Very good game! Quite addicting, I must say. It really shows that you put some time into this! Gameplay and mechanics worked quite well, the controls were almost perfect and easy to get into. It's also great that you managed to put some options for sound in this game. Some things that would be a nice addition to the game:
- a clearer visual or sound feedback of when the dash has become active again
- timer would not start again after death (so you'd see the duration of your whole session)
- you couldn't go back to earlier rooms (some times I accidentally went back)
- a death counter (as you die a lot xD)
Overall, super good gaming experience! I got to the last stage but didn't manage to beat the final level, it was brutal. For me the difficulty was just fine, games like these should be really challenging.