British English isn't the problem.
The spelling and grammatical errors in question have nothing to do with British versus American English. I see and use both...this isn't "colored" versus "coloured". One of the words on the soldier/bear caption I couldn't even decipher. The grammar problems were relatively simple...you use mostly proper English, which is appreciated, believe me. Just add some apostrophes--"can't" not "can't"--and remember that "you're," not "your," is short for "you are." I do like text-based games, though, and am interested in seeing the full version. :)