Very fun little game. If it was built out more i would pay for it. Some npc challenges such as gathering resources (and each resource required a specific tool) would be cool and different ways to unlock the map such as unlock a bomb that was open a destructible wall. I wasn't the biggest fan of the secret rooms as I'm still not sure if i found them all. This could be solved by having a list of collectables/ achievements such as number of secret rooms found. But the secret rooms i found were in places that i would naturally collide with the wall which was good. Maybe the eye upgrade could show the secret rooms if you're within 5 blocks or something to make them easier to find.