I greatly appreciate the feedback and I am glad to hear that you like it. The suggestions that you have are interesting and I was thinking about continuing the development of the project past the Jam and adding different difficulties - (ideally, these different difficulties may do things like altering the player size [bigger for harder difficulty, smaller for easier difficulty], this might be a tricky balancing act though because the collision masks are bound to the player [ie a bigger player is going to get hit more often])
As for the indicators for sounds I was thinking about possibly having audio do this for the player to know when their secondaries are up besides looking at the cooldown bars! (primarily because I don't want to obstruct the player's view too much but I am sure if I thought hard enough about it I could come up with an intuitive way to do this)
Either way, I really appreciate the feedback and comment!