So I'm gonna start by saying good job on getting this done and I love the concept of this game.
However... I was able to completely cheese the game by spamming jump and WASD. It was shooting platforms and creating a platform under me that I could always jump on. If I may suggest limiting the amount of platforms you can spawn in a certain amount of time. Or maybe making it so you have to jump on a red platform every time you make a blue one to make another.
I did love the idea of needing to destroy your platforms to get a score though. Great job.