In the last few day I:
-Forgot to post progress here lol
-Added and finished balancing the enemies and the mini-boss
-Finished the intro level
-Added a intro cutscene and a tutorial with the controls
-Added a title screen
-Added some sounds and music tracks
Today I'm planning to add a new level as well as new enemies and the first real boss, and maybe I will also add a score system or something but I'm not convinced yet