Glad you appreciated it! The sector map can be a little opaque in terms of where enemies pop up and maybe where the player can move but it's mainly just a way to get the player to plot a path towards the boss(es). With the upgrade menu, again, it's more a failure of communication, the weapons aren't really all that complicated, it's only really damage and cooldown that matter most of the time. The upgrade menu was an important but very late addition, so it's kind of messy. I'm sort of pleased in a way that I landed on the 'too complicated' side because I was worried whether a shmup would come across as too simplistic and not Rogue-like enough :)