Glad to hear you got it working!
As for the the boot to the title theme when you hit Left Shift or L1, technically a feature but I implemented it rather poorly and then forgot about it.
The top left and right corners of the pause screen have L and R next to where they lead, it was supposed to be like in Metroid Zero Mission and Fusion where you can press the shoulder buttons to go to those menus.
I just checked and R for the Status Screen doesn't seem to be working (it's the A key on the keyboard currently and it switches back and forth between status and map screens when pressed) and L just boots you back to the title without warning.
Thank you very much for making me aware of this, it will be fixed in the next build where the R button will go to the status screen and the L will bring up a confirmation window to confirm or decline going back to the title theme.
I hope the rest of the demo is smooth sailing for you, but if it isn't please let me know I'm more than happy to hear any issues.
Have fun with the game, Demo 3 is coming soon!