It took me next to no time getting the badges... very easy to get through without paying.
BUG REPORT
when leveling Void Spirit until Skill's up, the beast summoned losses one attack point (from 19/2 to 18/2)
TO FIX THE SCREEN,
there is actual scroll bars in the screen, so if you can reach bottom right, you'll see that you can play the game in full screen. Then, you can see the whole thing.
 "Icarus Needs"){kind=icon}
 "Mighty Party"){kind=icon}
 "The Fleas In My Head"){kind=icon}