Thank you everyone for your comments! Please keep playing and commenting. I'd love to hear what you think about the game, even if you don't like it or think there is room for improvement. :)
thisisnotasmile: Yeah the levels are generated randomly (but there are new types of blocks when you advance a level etc.)
With "no-go" situations the downside is that you can't get any points, but the upside is that timer is stopped in these situations, so you have more time to finish the level.