Thank you very much for all the kind compliments !
For the impossible levels, yes, we are sadly aware of this, but we didn't had enough time to implement a pathfinding algorithm. We tried to balance it, by taking in account the fact that some levels will always be impossible, and that your goal is not to finish all the levels, but mostly to stay alive and score big !
We are very proud of our interesting levels, even though they happen once every 5 levels !