Well its a good start but next time, try not to copy the YouTube tutorial directly. Add your own flare to the game. 2.5 for effort.

It would be good if there was a restart button or something, since I keep falling off the edge.

Not bad, for a little tech demo. But what you should implement in the demo is some kind of endless falling protection, so if you fall of the map that you will die and not fall infinite into the void. But besides of that, it is a bit similar to Quake or one of the earlier Unreal games.

If you need help with making a map, I could help you a bit. So PM me if you want.

Potential. It has it.

Very unfinished, not much more than a small map. With the addition of some AI and some more maps I can see this becoming an actual game, but not looking good as of now.