I am almost finished with an rpg called Spacehack. I am on a level called Snowy Despair where I need to get a green key. The issue is that the key is on the opposite side of a wall and to my knowledge I cant find a way to get there. Its a small puzzle but once I am finished with it, I can complete the game in a few more levels.
The game is really hard in combat but still easier than Dark Alliance.

I found the game on steam and there are no forums so that's why I am asking here.

Too long ago since I played this to remember, also somewhere into the snow levels I got bored and quit playing.
I suggest to consult walkthroughs on the web.

http://www.youtube.com/results?search_query=space+hack+walkthrough