Since finishing the course, I’ve been working on building up the testing grounds. I’ve made the following changes:
Brick walls instead of barriers.
a door that is randomly placed in that wall, so that the exit to every map is in a different position
themed maps, each tile spawns with one of 3 unique themes (two are similar but also very different)
AI that can go up a tower
turrets that are randomly activated
health pickups
a greater variety of assets