What I liked:

*Mildly entertaining gameplay with interesting gameplay mechanics.

*Simple controls.

*Interesting incorporation of theme.

*Colorful graphics.

What I did not like:

*Gameplay was too simple. Level design did not really challenge the player that much.

*Tutorial was not very clear, though I eventually understood how the game worked.

*Title of the game does not make sense.

*Game was too short. I could beat the game twice in five minutes. It should take five minutes to beat the game once. Also, there should be a replay button once you finish the game in case you want to replay the game without reloading the game page.

*Graphics would probably be better if they were not too simple. Perhaps you can use gradients in where the top color is a lighter color and the bottom color is a darker color.

*Lack of sound. This game would have been much more moody if it had a good soundtrack. Also, some soundeffects could make the game seem more polished.

*There is this glitch in the game in the image shown below. It seems like the character at the bottom of the level can not complete the level by going to the goal area. According the rules of this game jam, you are allowed to fix glitches in your game.

It's a very fun and overall well done game. I hope you'll make an update post-jam with those things you planned, as they sound pretty interesting. :D

Fun idea, I wish I got to use more green blocks (though I get how that could have messed up balance issues for your puzzles).  With some sound and a few more levels this could be a pretty fun game.  Great job!