Yeah I agree with the two first tracks being similar in rhythm and difficulty. Some people actually found the game hard regardless so it was hard to balance the game properly.
The arrows can definitely improve with more definition so that's also good feedback.
Bear in mind that this was done over a 2 week game jam outside of our normal responsibilities (work, family etc.) so it left us very little time to make the nice to have changes, and we had a lot we didn't get time to do. But if we do a reincarnation of this we'll definitely add this to the list!