Bug Too! actually does have some benefits when going to an HD resolution. Not as much of a pixelated mess as one would imagine.
Yes, I am very pleasantly surprised. It does make some difference. One can actually read what's on the gravestone in the background.
Here is another platformer, Pandemonium...
Ah, Pandemonium. It was quite popular back in the day but has been completely forgotten. With the internal resolution the character looks like a 2D sprite.
Thanks for your effort!