Actionless games with inscrutable strategy like this aren't my cup of tea. Played practice enough to get the card challenge, won't be bothering with it again.
Upgrade arrows, hold down arrow buttons, use mouse to change to a different window. Viola, continuous arrow fire. You can pretty much leave it run and go do something else while it grinds up tons of exp for you, then come back and make some foot soldiers to take out the tower.
I couldn't even tell if I was controlling my ship or if it was just moving and shooting randomly. Could have something to do with the very busy flash banner ad, those usually drag down the performance of whatever game I am trying to play.
Seems like a good game, but the whole thing about moving the wormholes while holding the ball with the spacebar doesn't actually work, and it makes things much harder than they should be.
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