Really cool and fun concept! I had a bit of a problem with reactivity of controls - maybe some UI with indications would help here. 

Very fun and simple idea! I think the gameplay could be greatly improved if the exit was a lot further away, the erosion was faster, and the cooldown (as others mentioned) was shorter!

Cool idea! The controls are a bit clunky especially when you're moving upwards, and the cooldown thing which a few others have pointed out

This is awesome! I love how simple but fun this is. I agree with the others that a visual queue for the cooldown would be helpful.

Good job! Would be great if the cooldown was shown explicitly so that the player always knows what's happening

Its a fun concept. A small indication of the block breaking cooldown would go a really long way. Nice job

The crumbling maze was super cool, great idea. The game is a lot easier when the target is below you lol. Awesome idea.

The crumbling maze was super cool, great idea. The game is a lot easier when the target is below you lol. Awesome idea.

Cool concept! I like the idea of a crumbling world working sort of like a level-timer.

One thing that confused me was that A and D were functional for navigation, while W and S were not. This made me play for a few minutes before I understood that it was actually possible to jump, if I used arrow-keys instead. 

The concept was really cool. A world that is falling apart is a really cool thing to see. However, the controls felt a bit weird. And would have preferred some more levels to play.

Fun concept would be awesome to see it fleshed out. Not sure if I agree with the up arrow jump tech tho. :P

Cool gameplay

quite an enjoying game, tough infuriating at points. The concept seems very cool and i am interested at what you will do with it further. Was a bit complicated to get used to the controls but with some refining will work.

Entertaining game idea and the mechanics.

I wish the controls were more responsive.

Very interesting game! Pretty good. Although feels a bit weird to play, and is too short.

An interesting mechanic, the player controller does however feel a little unpredictable. Fun to play!