Thanks Lion!
Your comment about the music is greatly appreciated since it was the focus point while making this game.
Cubase is a great software for creating music. You can also checkout Reaper, which is free. The only downside is that there are little to no virtual instrument out of the box and you'll have to search the internet for free or paid instruments. If you're on a mac, I greatly suggest Logic X since there are a lot of virtual instruments to start with, including orchestra stuffs.
Let me know if you need help starting out in the DAW world. I know it can be overwhelming at first!