Hahaha - thanks for the time spend with my game ^^
The randomness at the start of the game are a little bit awkward indeed. The thing is that the player needs to move before the first enemy is spawn. And after that, that enemy needs to be killed before the rest of the enemies will start spawning. So if the player doesn't move, there won't be any enemy spawned ^^
I guess I could have made that a bit more clear ... or just spawn an enemy after a few seconds. Wanted to give the player a short period of time to get used to the controls, before I would overwhelm him/her with enemies ^^