Cool Looking but not fun

I made a new game. This time, it was tedious, almost made me quit, but I made it. It's cool-looking and nice, but the FUN is missing. Yes, it's story-rich, but it ain't really well-executed in my eyes. Though, I think in my next game, I'd focus on getting the FUNNN out of it. I'd make it like you'd be HIGH~ dunno when though.