Thank you Kelvin, I'll make great use of this feedback later :)
About the deckbuilding: It's one of those genres where I get to do a lot of backend work and systems design which I enjoy the most when it comes to gamedev. It's also usually easy to add more content to without it being very art heavy, which is the sort of things I need as a solo dev. Alongside that, deckbuilders usually have a lot of opportunities for reusing assets, and I don't need to create a polished player controller, unlike for the majority of other genres (though this depends on the game again).