Walkthrough:
https://github.com/JME10135/Funny-Adventure-Walkthrough/blob/main/Funny%20Adventure%20Walkthrough.md
So it took me nine and half a year (yes, I played this game first the day after it came out!) and I still couldn't figure out how to get that last medal (thank you @JimmyCarlos for the help with that medal btw). Most of that time I was stuck on stage 10-9 because I didn't know about the 32-bit integer limit. I took a screenshot and some years later when I knew more about it I understood almost directly, after hours of staring on it and searching the web.
So what I am trying to say is basically: This game is hard! And not hard in the way that you know what to do but the outcome is not what you want. It is hard because you have no idea of what to do! It has its beauty in it too. Figuring stuff out is fun when you finally find the solution, and this game had a plenty of interesting surprises. Both good and bad. Let's just say it was an exciting adventure.
I understand that the author must have been very young while creating this, so it is an impressive result for a game. The graphics are very poor and so is the spelling (should have let someone who is native to the english language check it). The sounds get muted when you turn off the water flow in stage 5-6 to never return. Some minor bugs here and there, nothing too serious. There is a stage late into the game that tells the player to press alt + f4, which is not acceptable because it closes the game. The levels overall should have more of a hint system. The tab cheat should have been solved in another way imo. There are 101 stages (104 with the prologue) and no way to continue from a specific point? Jeez playing the game from the beginning to get another ending pfft. The puzzle pieces are only possible to look at when you find them too. You are appearently supposed to remember the numbers and shapes. It is also possible to cheat the bosses by holding down the mouse button. Yet the game is very enjoyable, because you are repeatedly hit by surprise by a creative joke or whatever the developer had shoved in at that place.
Funny adventure... It indeed was an adventure. Sometimes even a funny one. With so much creative content it is a pity that it is so hard and thus so few players have managed to enjoy it all. If it were to get polished and some elements that are insanely hard to find much easier I think this would be a great hit. It is a very special game as is.