Hi, I tried it now one time.( 1 on 1 game vs computer )
A problem that I saw are the big stones.
You can walk through them. This can be prevented by surrounding them with object "custom 5".
There are also some regions without any objects. This doesn't look very good, you should chenge this.
But it was fun to play it, so I will try it again tomorrow.( and give you more comments )