Quite the funny experience, and an interesting take on alternate history! Certainly quite interesting to see Pico's School in 3D, but unfortunately it also made it feel even disappointing that certain things weren't brought back in 3D as well, such as the cool boss fights or exploration or just other easter eggs/references in general (I know its not the main focus, but still). Also where's my first person raising hand action in the intro: I really wanted that!
Moving aside from that and focusing on the Peter the Ant action: it was simple, but I enjoyed my time trying to crush the ants, and loved how you could hit the corpses (both the ants and other corpses) even after death to have them splat blood: that's some classic, old-school gibbing action I like to see. Though having said that, I did find it a bit disappointing that hitting the corpses, or indeed hitting the ant initially, didn't have a satisfying splat sound: instead it just plays the same bonk sound effect which wasn't as satisfying.
All in all, it was good for a few laughs. But for the love of god, please explain to me how you can code a trigger to fire an event that gives you an achievement saying you've killed Peter the Ant and beaten the game, but you can't use that same trigger to display a victory message in game! Not realizing I had already beaten the game, I got so lost that I ended up smashing all of the shit with a hammer to try and progress. That shit is on your hands, plufmot, your hands!
Happy Peter the Ant day!