It is a very nice game, quite original. I feel like it would benefit from a bit smoother transition to high difficulty, but very fun anyways. It could probably be scaled up into a very nice mobile game!
Thanks for the review, I agree about transition, I just wanted to let the players know sooner that there are rockets with more than two colors as I believe that on average game jam games are played only for like a minute before people go to the next game.