I like the idea very much, a tower defense game, where you are the tower mixed with bullet hell, but alot of things are missing, sadly.
I don't have to say that not all art assets are in the game, the player doesn't know against who he is defending his own coins(?) and it isn't very clear what kind of an attack the player has equiped and it isn't 100% clear with every attack what effects it has on enemies, I had trouble with understanding when I can attack and when I am reloading, what range my different attacks have and how much damage I have to deal to the enemies until they die.
Another thing that I found hard was combining the different attacks, especially when I don't know what attack comes next, I think you could improve this by giving the player a second attack, like if I press right click I have my attack 1 and if I press left click I have my attack 2.
And besides that I could never move on to wave 4, I don't know why, the enemies never spawned in wave 3.
And if this this sounds very harsh I am sorry, I don't mean to let you feel bad, I just see alot of potential in this idea and I would be happy to see this game improved in an update.