I plan to upload a new build in a few days with various small improvements, changes, fixes and a "Beta" of the Daily Challenges mode.
Daily challenges explained
The Daily Challenge is a single building level, that you'll get to complete only once a day. The current test levels are pretty hard tho, so you should have a very nice challenge in them, and that's kinda the point!
Everybody has the same daily challenge level, but the way you play it (shoot a soldier or let him live) can change the outcome of the level.. so it's worth trying different tactics!
The first version won't have achievements attached yet, until I'm sure everything works as it should.
Later I'll add achievements for completing X amount of challenges, so you got something to aim for ;)