Thanks, wasn't familiar with these, I'll look into them though the project direction is unlikely to change to swap Godot out. As of now, the binaries are in the 60-80 MB range; so not tiny - but not something I'd consider massive for what it is.
Usage has been relatively snappy (could be better, I suppose, I need more time). Definitely not sluggish.
A concern is that RAM usage is on the higher side (this is something I'll look at on the next release).