Really interesting, the mechanics of the game allow for quite a few wacky strategies to consider:
- drop the smiley crates before they are freed, so that the smileys do not join the enemy forces
- drop the early crates in (regardless of content) in a way to block the enemy forces
- perhaps bait the enemy forces to jump out of the map? (I managed to do it in isolated instance, but doing this consistently would be pretty difficult)
- ...?

I'm not sure if i'm just a bad player, but dodging the attacks (especially early, when there are no obstacles in the gmae) seems impossible. Hence the wacky strats I came up with :)

It would also be cool to have a way to extend the game duration somehow. Under such conditions, it would be interesting to see if there is a strategy perpetually extends the game duration and farms infinite score. (E.g. I suppose if the level becomes cluttered, the enemy forces have a harder job)

fun game :) but, consider some additional keys? arrows work (my preference) but Down is scrolling down your page. with WASD, the X key is covered by my left hand (while i'd like to use both ;) ). Maybe a FullScreen button will alleviate my frustration :)