Very cool idea for a metroidvania and also fantastic execution!
I can't help but feel like the 20 minutes time limite is a little too lenient for all mandatory tasks. I haven't tried getting all checkpoints in a run though.
An annoying bug I ran across after dying to bosses was re-spawning with something amiss with Oracle's sprite: you can re-spawn flipped horizontally, vertically, invisible...
There's also the shadow/vision of Salesman's tail lingering in the air during the final battle.
There was this whole plot-line about a virus but I'm not sure why it was here since it's not necessary to beat the game. Maybe I should have tried to find the right suit or something? Sounds kind of annoying to be honest: there's suits everywhere with no indication of which one is the safe one, right?
I only have 77% completion so I might be missing something else here...