I did it. I finally did it.
After about 2 hours of grueling torment, anger, torture, lots of broken objects, hair pulling, and more importantly, fun, I collected all of the medals. Yes even collected all 144 stars. So, this proves that all the levels are indeed possible and it is also possible to 3 star all of them, to everyone saying it's unbeatable.
The game itself is very nostalgic which is nice, everything is very reminiscent of the olden days of gaming where all the levels were ball crushingly difficult and the only reason you couldn't beat it was your own lack of skill or wit. The game definitely kept me on my toes and kept me thinking outside the box, using different strategies and such. The fact that you play as the enemies of the hero rather than the hero itself was very interesting and I rather enjoyed it. I found it amusing that usually the enemies are the overpowered ones, but this time the hero is the one with the ability to one shot final bosses because his fireball singed their toes or something. The graphic style and the music is very nostalgic and brought back the feeling from more rage worthy games in my early days. The only issue I had was lost level 2, in which I saw the immediate effects of slight hit box displacement and how the fireballs don't exactly have to touch me, but only a few pixels below to actually kill. Thus, prompting the singed toes remark before. Normally this isn't even an issue, and it probably isn't but in that particular level, a level where even the slightest distance is the difference between life and death, that incredibly minute hit box extension killed me more time than I could count, quite literally I lost count. I still managed to beat it though, so it might not even bear merit worthy of looking into, just thought I could throw that in.
The only actual issue I can name is lag. I'm not sure whether this is my computer which is an invariably a brick, or the game but I experience tremendous amounts of lag in many sections. Sometimes this helped me and sometimes it screwed me, like when trying to time jumps properly, especially as King Bowler at the end, it can get super annoying. It does help shorten time though, I think that's how I manged to get level 12 done in under 5 seconds, the lag shortened the time for me, and I just ran through the course as fast as I could and I got it.
Overall it is a very fun game, it is frustratingly difficult, and it will make you smile, then punch something, then smile again. The game had me flailing my arms in annoyance more times than I needed to and that's cool, the greater the challenge the sweeter the reward.
To anyone that needs help with the 100 plumbers, the quickest way I found is level 2 and you can just walk right the instant the level starts and fall on top of the plumber. This can net you a kill every .5 seconds plus however long it takes you to restart the level again. Doing it this way can net you the medal within a few minutes.
Also, in case people are still complaining, the game is 100% beatable. Don't blame the author for your lack of ability.