There's too much going on. It's a mess. I think you need to simplify and take out a bunch of the extra stuff.
Why does my gun automatically rotate? Why are there clowns in addition to the ghosts? What are those skulls? You're thowing all of that stuff at me right away at the beginning of the game, and I haven't even gotten a chance to get familiar with the game's controls. I don't know what I'm doing and all of this stuff is happening to me. Not fun.
When you add in the dice rolling trap mechanic, it's just more stuff on top of stuff. Sure that's the theme I guess, but there's just no reason for it. Why do I want to roll a dice to determine the number of ghosts I can trap? Why is that more satisfying than the alternative?
Simplify. Simplify. Simplify. Strip it all the way down to the gun, the ghosts, and trapping them. Try to make just *one* satisfying interaction, and then build the rest of the game from that.