playing this without really thinking it through, so my remarks may be off.
the mechanics are unusual in the sense that they're deceptively simple but cunningly difficult at the same time... challenging.
becoming stuck (in level 3, e.g. when reaching the spaceship without the key) is annoying. could be that you intended this, but for a casual game it would feel better if that couldn't happen.
related : having to grab the mouse to click the 'replay' button is annoying too. maybe just use a key ? same goes for the 'next' / 'prev' button.
when the spaceship flies away it triggers an annoying (growing) scrollbar at the bottom of the page. some overflow: hidden missing somewhere ?
overall I like the concept. someone else already suggested making the board larger, which I completely agree with.
Hey thanks for the feedback! I hotfixed the issue with level 3 and added keys for next/prev/restart (period, comma, and 'r', respectively).
The overflow thing I'll have to fiddle with. I am with you on the board size, and I'm going to try to find a better way to do it than the zoom.js plugin. Tile sizes currently are hard coded into the css AND the JavaScript because I'm stupid, so I'll have to figure out a way to make them fluid-width. Hmm....
Hey, game author here! All the sprites are from an svg icon font and the rest is all just divs. My understanding is that the blurring has to do with how certain browsers handle 3d transforms by converting vector graphics into textures:
Great idea, great concept! Keep on! You got your first addict.