That's what I used to extract it

Just download 7Zip, it's a free alternative to RAR. (RAR has a subscription fee)

Is it possible you could upload your game as a zip file? I'd love to play it!

I really like the game, but the controls were a bit wonky when jumping on top of something because I'd get stuck and have to restart. Also, the player would get stuck on his own bullets, most likely because there is nothing saying: "Hey, don't include this guy in the bullet collisions." Otherwise, it was a solid story, with a responsive combat system.