There were some nicely designed puzzles in here, where it's possible to plan ahead and form a strategy. It didn't keep me hooked beyond the easy levels unfortunately, but some changes in scenery and perhaps one or two new mechanics dropped in along the way may have kept the intrigue for me. Seems like a solid puzzle game though that clearly has a lot of depth!

Nice puzzle game coming from a puzzle game fan! Here are my comments.

The good:

> I like the concept because it's simple and yet has the potential for a lot of challenging puzzles. Reminds me of Sokoban where there's very few elements but the possibilities for really devious puzzles are there.

> I like that there's an undo button when you hit a spike. This might seem like a minor thing, but it shows that you really had the user experience nailed. As a puzzle gamer you don't want to have to repeat an entire level again just because you mispressed and got hit by a spike.

> The progression of the levels is good (and the level design itself). It lulls you into thinking that it is a simple game but progresses into something very complex.

Other comments:

> Sound / music would be awesome, but seeing as you did this without an engine and eveything, it's very understandable.

> The color hurts the eyes a bit if played for too long. Maybe better if you use lighter ones?

> Not sure how well it fits in the theme, because a puzzle game does not necessarily need to have movement in the first place... so it kinda turned out to be just a normal puzzle game. Great game nonetheless!

Classic ice game with the additional puzzle of the objects moving with you. Really cool!

Good game, but I didn't even tried hard level because I can't finish all medium level (only 3/5). Overall the game is pretty fun, nice concept for a puzzle game

The idea is good, but the levels become too hard very quickly while the gameplay and sprites remain the same. There game is missing diversity.