The animated intro is awesome, the art is cool and the game overall feels good. I succesfully reached floor 1, but the game seems imposible. If you want to get the maximum value of the laser you have to stack enemies, but that means a lot of fireballs on screen. If you dont stack enemies you waste your power and die early. In my opinion, the game needs a little balance, like chests giving 75 instead of 50 for example, so the game seems winnable and not imposible. I reached floor 1 with 200 power and a lot of enemies on screen, i dont know how much life has the boss but seems impossible.
Some bugs i found: There is a chest in some floor in top left position that seems you cant open (its too far) and if you change your chrome window and then return to continue playing sometimes the game is occuring in for example floor 13 but im trapped forever in the floor 14 position, maybe pause the game when its not focused by the web.
Fun game though, just needs a little bit of balance so its not that hard.
Also, you can try my game if you want, it just takes 5 minutes ;)