Protorogo

Protorogo is an idle roguelite with a focus on ability synergies and strategy for defeating progressively more difficult enemies. You play as an immobile white circle, obtaining parts and abilities from the store to defend against the waves of red enemies. Complete achievements and unlock extras! Gameplay is intended to be accessible to most platforms with easy, simple mouse/touch controls. Most of your interaction will be selecting options from the shop to effectively build your strategy for defense. Your skill level will lie in your strategy and luck.

There is a brief tutorial for those who desire it, however, if you've played a roguelike before, understanding Protorogo is very straightforward. The most nuance you may find is how abilities/perks interact with each other and enemies.