Found a little bug on character switch screen, when you browse quickly enough sometimes a character occasionally disappears; even when stopped it doesn't show up- Same thing with levels. I'm also getting the same highscore table for all levels in the game... seems like the table for level 1. And, if you open the table before a level and click 'close' you click 'continue at the same time and automatically start the level, might want to fix that!
While browsing levels or characters, it'd be easy if you could click on the circles to navigate instead of having to go the whole way around if you want to get to one at say the bottom. Not that it's a huge difference, but it could speed up the process a bit. I feel the transitions between the choose character/level menus could be quicker too, especially if you play a lot. I also ran across some strange sound bug on level 6, where the shooting sound disappeared, and then on level 7 the music disappeared as well. And then suddenly there's no more music! Restarting the game brings it back though. I still heard the medal sound btw, so it's not everything.
The design is awesome, so smooth and friendly. Music is catchy and varied and the interface is a piece of cake to use. The speed arrows don't seem to have as large effect as I'd like though, and the characters are somehow designs enclosed in a white circle. Maybe vary the outer color a bit? Or don't have it as a circle? The first character's perfect, and for the second one the outline follows the form, but for all the rest (least the ones I've unlocked so far) the form is enclosed in the white circle regardless of shape.
Twas a lot of fun playing this game but it does get monotone after a while, with the same coin pattern for all levels, the same type of venture in each one, visual differences and increased challenge but still so much similarity. Great game overall though, keep it going!