I haven't played either of those - but looking at some random let's plays on youtube, I can understand your idea. I think it would work well.
On another note, if any of you are interested in poking at what i have so far, I have an alpha release available here:
https://goo.gl/LD8VxrControls:
Arrows - D-PAD emulation (movement, entry of doors)
Space - A emulation (jump)
Ctrl - B emulation (attack, interact)
Enter - Start Emulation (menu, pause)
A - Select Emulation (Cast spell)
Debug Keys (Not valid in overworld):
S - Give Next Spell
I - Give Next Inventory Item
Mouse wheel up - Increase XP by 5
B - Boss Camera Mode Toggle (stop screen scrolling)
I am aware there are several bugs, but feel free to post anything you find that's out of the ordinary as I may not have found them myself yet
