Questions about Incentivizing Players

1. Do you plan to have Steam Achievements?
2. Do you plan to have Steam Trading Cards?
3. I read you plan to eventually do matchmaking.  Is their a plan to have any sort of leveling or league system or ladder or elo or regular tournaments (or multiple of those things at once)?  Basically, is there any plan to keep people invested in the multiplayer?
4. Are there any things I didn't specifically ask about that will keep players coming back for more?

I know these things are silly and artificial, but I find it a lot easier to play a game where I can easily tell I am making progress than a game where the only reasons to play are "for fun" or to get better which are a lot harder to measure.

It is a great game so far!  Keep up the good work!