Hmm, I tried playing the 3 Undertale songs in the game folder, I got an error saying the format was unsupported or it was corrupted. :/
I opened the game, the music started playing like 10 seconds before the window popped up. (even in my taskbar!) Not sure if intended.
Not sure what the "GUI Display/Delay" means, care to explain?
Also, when I start a new game, I can't move. To be more exact, sound effects work when I press the Jump and Shoot buttons, but no animation is present. Kid is on his toes, and the jump refreshers don't animate. (which I recall doing so in your previous games)
Also I recognize the place I start in. Wasn't it a secret room in one of your previous games?