For survival: Reaper, Skeleton, polymorph, locusts, earthquake, your choice for 6th. Keep reaper and skellies up at all times. Use locusts liberally. Earthquake whenever top floor has more than 10% or a lot of enemies are on screen. Polymorph any bigger enemies. If champions make it to the top floor, just chain cast skeleton and they should finish them off soon enough, poly when available. I stopped after 32 minutes using this strategy because I got bored.
Also a bug in the user content: If you load a user-created level when you're already in a level, it moves your current level into the "background" and you basically have to restart the game to fix it. Try it and you'll see what I mean!
Decent concepts plagued by really terrible level design. I'm not a huge fan of levels where you can't possibly win on the first attempt (barring blind luck) e.g. level 21. Where's the skill in that? And some levels which should be hard have trivial solutions, e.g. level 37 which has a 5 move solution that can be seen after only minimal scanning. Only a handful of levels actually required thought. This would really have benefited from good level design!
Nice ending.
I beat the final boss using the stun missiles, faster/longer paddle, and critical hit. Just play defensively and eventually you'll get enough stun/critical shots past him.
The level transition is a bit slow. While I think it fits with the style of the game, I'd recommend at least letting people skip it.
Also, the level completion bonus seems superfluous. What is it accomplishing besides inflating the score? Seems to me you could remove it and then the score would become a more pristine representation of your efficiency at solving levels.
Finally, I think you should be able to see your score on each level from the level select screen. This will encourage people to compete for the optimal completion scores.
Good game!
Good concept. More AI options would be good ... perhaps as components that you can purchase in the store. e.g. the "sniper AI" module might weigh 3, etc.
For challenge 4, I just let the Sword do its thing, and manually controlled the Shield to keep just outside the minimum distance from the enemy. It was frustrating, but after about 5 attempts I got it