Recently released an alpha test for a simple Top down shooter game I was making (Play here): https://play.idevgames.co.uk/game/bright-blight-shootout-alpha-v2
But I also released the source files on itch.io for $1,00: https://meatyeeter9000.itch.io/bbs-alpha-template
Feel free to try it out and use it as a base for your own projects.
Features:
Upgrades system and Pause menu
Boss spawn (boss spawns at multiples of 5)
Waves of enemies
Lighting
Game Menu
I still plan to continue this project and make it better but at the moment the development is on hold.