I must say I thoroughly enjoyed the graphics and mechanics of your game and it was well worth tying up my internet connection for half an hour to download!
I am planning to write a review of it soon, and was wondering if you had considered adding a save feature to the game, or if I somehow missed it. I had to play through several times from the beginning as I did not commit enough time to it originally! Since you already have automatic checkpoints, I wonder if it could be done without too much effort.
Either way, I'll definitely look forward to more from you in the future.