Hello /vr/. It's been a while since I've been looking

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156KB, 1500x1500px

Hello /vr/. It's been a while since I've been looking for a computer game that I used to play when I was a kid. I will tell all the details that I can remember hoping that one of you can help me.
The game has a prison thematic and the main character is either trying to escape from it or enter it for some reason (it's more likely that the second is more accurate).
The main character is a small fat guy with big eyes and a prominent lower jaw (much bigger than the upper one). He wears a propeller beanie and wears normal shorts, shirt and shoes.
The first stage is the outside of the prison. It's a 2D game and there's a big ladder on the left bottom platform which allows the character to go all the way to the top. There are other platforms and the goal is to reach the watchtower on the top right side of the wall jumping from platforms to others (but there aren't many platforms, it's very simple).
There are ghosts of dead prisoners walking in some platforms and there's no ground but the sea with sharks.
The wall is tall and there's electric fence on the top of it. I think it's raining and it's at night.
The main character has a slingshot which can be used to shoot the ghosts to reach the watchtower.
The second stage is inside the prison I believe, the main color is orange. There are ladders and platforms again.
In the middle of the screen there's a big padlock, and on the bottom right platform there's a paper clip (or a diaper pin, I believe it can be used to open the padlock maybe). There's also a lizard-like yellowish guy on the background and he's walking from one side to the other.
I don't know anything else about the game, I was very young when I used to play it. It came in a CD with other games that my aunt received when she bought her first computer with a Windows 95.
The game that I had was a demo version and I remember that the name of the icon was "Arc demo". I couldn't find any game with this title, so maybe it's not correct. Can anybody help me?