I like the concept and it was fun. I think the difficulty curve could ramp up more quickly - at some point it felt like getting easier than more difficult.^^ I played until stage 10, but I didn't see any difference in the stages.
Thank you for playing the game! The difficulty curve was the only thing we couldn't fix last minute. It ended up making the game hard for bad players and endless and easy for good ones. But, hope you still enjoyed it !