thanks for the feedback and checking back in! the "size" stuff does typically confuse ppl! there is a glossary in the game with all the symbols, though you're right that i don't do a good enough job of actually communicating that it's there to the player. in the full version, there will be a more robust encyclopedia that explains all the mechanics :)
Viewing post in Retromine - New Demo Out Now! comments
Yup, once I found the encyclopedia it was easier. But I would heavily recommend adding tooltips. Stuff that you can read on the fly and be reminded what does what. It might be difficult with the current way the game is built as you can only hover on the whole card and not parts of it, but believe me a change towards that direction would do wonders in learnability of this game.