This seems pretty solid for a simple 3D platformer. Unfortunately, there are some missteps that bring the game down a little. The mouse should be invisible and locked to the middle of the screen so it doesn't distract you and get randomly caught at the edges of the screen. You should also be able to look up and down to be able to judge jumps better. Finally, a shadow would also be nice so you have a clear idea of where you will land.
The basic movements feel pretty nice. I like how the character smoothly rotates towards the direction you're pushing rather than instantly snapping. I alsp like the of spending bubbles to activate bridges, but I think this would be more interesting if you had some option of which bridge to activate, allowing for multiple routes through level. Unfortunately I didn't get far enough to see if their were any other mechanics to comment on. I couldn't manage to get past the spikes on the second level.