Really nice game! The dash mechanic is a very important part of the game and I like how you have built the world around it, forcing the player to learn how to use all its potential.
One thing I missed is a little tutorial about controls, I used at the moment the arrow keys and C key (the arrow keys are 'mostly' obvious in every game, like WASD, SPACE or others) but I think a little tutorial is always welcome.
And last but not least I have found that you canresize the window horizontally and the camera fits the 64x64 resolution only vertically. It matches with the issue that said Adam Pajor about subpixel level and I think you should know that too :)