Thanks Daulton! We appreciate you sharing your thoughts with us! 

Since we wouldn't have time to implement an audio slide or some form of options menu, we opted to leave the music not to high so we didn't blow people ears out lol, but in some systems or audio devices it can definitely be an issue.

We also like the idea to include a counter of how many uses you have on the Q powerup, and carrying multiple people at the same time.

We decided to not allow the player to go back up the floors by default*, because we thought it would provide an extra challenge since the player would need to make sure he got everyone on the floor so he can proceed to the lower levels, which makes the Q powerup more relevant and valuable. 

*What I mean with "by default", is we have plans to add placeable stairs as an item like the bomb, so the player can go back up if he needs to, but that is part of a future iteration.

About the rest of the issues, those are part of small bugs we didn't have time to fix, but we'll definitely have a look at that on future updates.

Once again thanks for your feedback, we really appreciate it!