Good concept and nice use of the theme. 

I wonder if this might work better if the controls were mouse-based rather than the player controlling a character. A lot of time knowing what I needed to do, but there wasn't enough time to move around the screen to combine the colors. 

Great game! Simple but very effective. Tough, I ended at 13 points!

This was tough - I'd definitely fail Potions class :D

Very nice game, though the witch's laugh will haunt me for some time! 

I had a lot of fun :) This might be a little bit tooooo hard, but that's just me looking for things to criticise !

Nice entry, my best was 13 ^^