Interesting concept! You would think that limiting a tower defence game to only having one tower would remove the satisfying build-up of power that characterises the genre, but having you reposition the tower and gaining stats successfully helps mitigate that!
A problem I found was that sometimes the tower misses shots due to the bullet travel time. This could be fixed by either:
- Having the bullet go extremely fast (and leaving a trail behind it so you can see it).
- Having the turret "hitscan" the closest enemy and damage it (but it would remove the piercing mechanic and that would be sad).
- Having the turret calculate where the enemy will be when the bullet reaches it and fire there (but that would require some sick trigonometry tricks on your part).
All in all, this is a neat game, thanks for making it!