Hello there!! :P
You made a really fun game, the base concept is really fun and the levels are challenging and lights a fire in you and makes you wanna complete the game and that feeling in itself tells me that this is a good submission.
It would have been nice to have some animation and simple audio(not music) in the game would have been much more fun. But nothing to be worried as nothing stopped me from finding the secret room.
Kudos for making a entertaining game. Have a great day!!! :D