well, internally we had the same questions, and we ended up changing it to a less challeging version of the game than the one we first had, where the bpms would go up every time that you open a chakra and with no automatic heartbeats.
Maybe something else is not right, and definetly difficulty balancing is a challenge :)
After the jam we will probably do a revision and make a final version, and I would like to have your opinion on that.