Hey, no need to rep back. I don't remember if I played yours since I played quite a lot of maps here but it looks proper, Orcs & Humans and stuff.
I repped you as you updated it, being quite some time from when you first released it
I'm learning Japanese from a private teacher. This was definitely "tsu" in its original use. It's used for putting a tiny soundless gap inside a word, which is one of the 2 ways to make a sound longer.
Although you can use it as a smiley too