Enjoyable yet unpolished.
Played it all the way through. It was fairly intuitive, but could probably use a tutorial video. Took a little while to notice that I had to hunt for the colored squares before I had that, "oh duh" moment. Could really use an opening screen. As someone mentioned before, it could also use some kind of a treasure room. If you're "collecting" items by completing puzzles, you might as well look at your loot. You could also use the treasure room as a level selection screen. I'd like to be able to select levels. It also needs more of a congratulatory ending.
Background music could be a nice addition, as long as it's not overwhelming or irritating. Although, if you want to be a bit mean you could have some kind of fast paced "hurry up" music when the clock hits around 15 seconds.
Overall the gameplay was good. Smooth. I think it just needs to be fleshed out as more of a complete game. Seems incomplete at this time.