I had the same problem too, but I searched for the missing file on google, and I installed a pack called RGSS-Standard. I have absolutely no idea what the pack is, but the game works now. Before coming here again I found the dll file by itself which can be found here: Removed. Reason why is in my next post, it also didn't help anyway.
I'm guessing you can put that in the same folder the game is at, or if that doesn't work then copy it to your system32 folder.
Edit: I might as well upload this too.
What I noticed while playing the test was that the order of the frames while walking is in the same order as they are on the sheet(i.e. the order of the walking anim is standing frame, to right foot out, to left foot out, to middle of walking anim then back to standing frame). Is this going to be fixed or do we need to edit the order of the frames on the sheets? Otherwise everything looks great and I can't wait for more.