I found the "How to play" button a couple rounds in. I didn't notice "Choose deck and opponent" until after I started a quick match, then I tried story mode, switched to a computer instead of mobile, won a round in story mode.

A couple more notes: -On mobile with a full field, some of the card information seems to get covered up. -Also on mobile, the 'x' button to get out of the collections tab doesn't seem to work. On computer UI generally seems better and fully functional so far.

There is also a lot of residual Spanish in the English version of the game. I'm a bit torn on this--I think for card names it's cool and keeps everything appropriately Uruguayan-themed, but for things like the card flavor in the 'collections' menu it might be better translated. So far I've only found actual game-rule text in Spanish in the "Truco Cimarron" section, which seems to be a different game anyway. Also, a fair amount of the 'story' text seems to be idiomatic and isn't translated very well to English. It is technically correct but doesn't make a lot of sense; I switched to Spanish and it was a lot more understandable.