pretty cool concept, I got soft locked by taking the greedy cards on world 3 and then couldn't get my score at the right number to take the first zero launch fuel. At first I was confused about how to get a higher score but once I realized that the order you take the cards in is important it was just a matter of learning what cards are available per level and then the game plays quite linearly. Seeing big number go up was very satisfying lol.