I'm glad I didn't quit before the end, but you got to have some nerves ahah :p
You have a finished and nicely done game right here ! Really cool simple gameplay but with good evolution and variety, loved the labyrinth part.
Here's some ideas to improve it: reduce the character hitbox (a little bit too frustrating), new tiles with special effect (teleporters, speed booster, invincibility bonus for a short time), moving tiles for more level design / labyrinth possibilities, other sort of enemies (faster one), doors and keys... So many stuff can be added, this have a very good potential !