Hi!
Thanks for the kind words - truely appreciate it!
Yeah, the spawning of new enemy waves can be a bit unfair sometimes. It does try to make sure they at least dont spawn right on top of you, but as it gets more and more crowded it can happen sometimes anyway. Perhaps I should make the player invincible to damage the first second or two of a new spawn of enemy waves.
The highscore feature was a bit of a brain scratcher :) the old NES password style was what inspired it :)