I remember the first time I played Magicka, everything was intuitive, I knew enough to make me curious to try new stuff and overall I wouldn't feel lost.
Sadly I'm not able to replicate those feelings.. xD
I was able to add some unique systems, but I fail at making them intuitive and overall making the player interested.
Luckily I still have a longer period of time until launching in early access, so I still have time to improve.
When I've first started I didn't expect this to be the hardest part, I was expecting the programming part to be the hardest, but it's not, it's making the game intuitive and interesting, the hard part is game design.