First review in a while bit this shows a lot of promise. Most of it can be attributed to lack of polish only then I feel would the game be better, this would include slightly better textures in the rooms and walls, earning the ultimate instead of having it as an ability, adding different types of projectiles/bullets based off the power ups found in the dungeon, and finally a file save system.
This is an extremely promising build of the game and I would love for it to improve. Keep up the good work.