Fun game, thanks!
The trackpad works great! The keyboard controls are wonky, though; It's RDFG, with D as down, F as left, G as right, and R as up. Any chance of including WAZS for us qwerty users in the next update?
I've played through more than half the easy levels already, unlocked a couple new characters; I like that you can change your character on the fly. The environments are pretty, too. I keep distracting myself, panning around and clicking on people or signs hoping something will happen. You should make it so that if you tap on a person, they say "hi" or give you a game tip or something! Well, maybe make it a rare thing so that it doesn't always pop up while you're trying to play, but you get the idea. Heck, maybe you've already included it and I just haven't found it yet, I'll keep looking.
Also, maybe turn down the volume on some of the sound effects... I don't want to turn them off, but the loud steam "PSSSHH!!!" effect is kind of jarring, especially with the nice calm music. Also, the little arrows that appear to show you which way you can go, they sometimes cover other towers (like the color of a teleporter) depending on your height. Not sure what can be done about that, though... if you make them much smaller, you won't be able to see them.
But yeah, all in all there is a lot to like about this game! The gameplay is strong, the music is nice, and the graphics are cute. Normally I hate loading screens, but that cat makes me smile. Excuse me, I need to go put off work and go play it some more.