GDevelop has a bunch of Post-processing effects easy to implement with a few changes, so it´s easy to add and juice up the game a lot!!
Hahahaha, I know, I know, 4th level was built in a rush and its difficulty is extreme (I’ve made a Gameplay video, and it´s the only level I need to restart… twice; and I played it a lot after uploading the game). Obviously, I ran out of time to implement checkpoints… ^^!
My first idea was to make it more of a white and clean lab scenario, like Portal, but I saw the bot-wheel sprites and the background assets, and the visual design was clear for me. With a little color (the visual warning of superpower activation, the lasers…) for contrast.