Thank you for playing! Did you end up figuring out what to do? I'm sorry for inconveniences! I still have a bit of a hard time figuring out where and how much player feedback I want to provide. I did have plans for a tutorial but due to an arm injury I was unable to keep working on it, so I just quickly put together a simple "How to play" screen, a tutorial would've benefited I feel!
It was definitely, originally, intended as a mobile game, so the controls are somewhat mobile-like too (as you have assumed correctly haha), however, I messed something up when it comes to the webGL resolutions so unfortunately I couldn't add the "mobile" tag on there. Time to figure this out for next time!