Stage 01: The delay on the secondary melodic instrument sounds like drifting bubbles which is a cool effect. I really like the jazzy quality of this track. It seems to change directions periodically with different rhythms and feels which I think would make gameplay really interesting and captivating!
Stage 02: This is a darker stage, but I like the energy that the drum kit continues to bring to this stage. The saxophone works really well here!
Time is Running Out! Theme: This is a very foreboding time is low theme. I love the half step up modulation that signals the last few seconds before time is up!
Overall: This is a great idea for a simple but fun game. I hope that a game developer finds this and decides to partner with you (unless you are also a developer, in which case you should totally make this game)! The jazzy nature of your tracks plays into the casual puzzle gaming experience and I think it was executed very nicely. Well done and thank you for sharing!