Really smooth game! The dash mechnic is a nice addition and it makes the movement really enjoyable ^^! I also like the little particles on the character's head, instead of just having a square, it's a nice little touch =).
At first, I was a bit concerned by the "you have to go blindly through the doors" aspect because usually, all sorts of unfun instadeath awaits. But not in that game, and it was a relief! The clever level design made it fun to explore, and you opted for subtile and fun trolls instead of painful traps. That felt amazing to play!
I really enjoyed the little time spent on your game, congratulations =)!