The ball movment works but its really gay and not zombie like.. anyone have any other suggestions..

Okay im making a basic zombie game but i have a problem i set the wall to solid so the player with 8 movment can not get through it but the zombies with bullet movments like in the tutorial can? anyone know why and how to fix id appreciate it

thanks

http://www.mediafire.com/?a3sztclqd9l

The above link is a rar download of 3 games i made

I first made a basic zombie game from tutorial. Move with keys and shoot a zombie 5 times to kill it (left click)

Next game i made was based of a game called chicken invaders but this game is more of like a asteroid view i guess and you hit the right ctrl to spawn more chickens at the big C ships. Left click shoots a laser (3 hits) right click shoots a green laser (instant kill) and the middle click is a laser(instant kill laser)

Finnaly i tryed making a physics demo and i think it came out well you can drag the stuff you make but they sometime freeze in mid air

NOW for my question, i would like to make a zombie game but how could i make like walls for me and the zombies and how would i make blood or so come out of a zombie and disapear?