Awesome.....this game brings back memory of Sonic
So after reading the review of the guy below me. I didn't experience many of the issues that he experience such has freezing in the swim level and getting stuck in the corner. I wish you could stomp on your enemies or something. As I said, this game remind me of Sonic the Hedgehog, I keep feeling that when I get up to speed running I should be able to roll through the enemies with some sort of fancy pants attack like you were able to roll through enemies in Sonic.
The game play was very smooth and enjoyable, the controls were a bit loose but I think that was on purpose because they fit the game well in general.
Improvements: I'm not really clear why I am able to jump through the bottom of all platforms. It make the game too easy. It would be much more challenging to have to wall jump, flip etc to get around them. It is ok to be able to jump through some but many times it didn't even seem intuitive to jump through them as I was the challenge of as I said wall jump and flip around them.
At any rate, great game and I look forward to playing the finished product.