Take all the time you need. If I have to choose between playing something unfinished and unpolished today or wait six months and play the finished, vastly improved version - I'll gladly wait.
You've got a really cool concept here and I'm curious to see what changes and additions you'll bring in. My only request, in all honesty, is just 'More.' because I really like what you've got here and aside from the complaint about Magic's inability to discern healthy targets from zombies, I honestly can't think of anything I would want to adjust or change.
Really solid game so far, so keep it up.