Here's a winning set of skills: Brightbeam lv. 3, Handsome Blade Lv. 3, and Doppelganger Lv. 10 With Brightbeam and Handsome Blade I can use both alternating, and the cooldown on the other is always done by the time the animation finishes. I use doppelganger to dodge an attack once every few, so I can accumulate a pile of HP drops.
NOTE: my strategy may not work if your computer runs the game at full speed, mine lags a bit.
I killed the first boss with just Katana 1. where's my achievement? I thought that I had to kill the last boss with just Katana skills, but other commenters say they have won it by beating the first boss.
So, apparently you can break the game by filling the bottom four rows in checker-board pattern with heal tokens and blue gems, then converting blue gems into tokens
the best way to kill the last bunny is to buy 20 grenades, then throw them all as soon as it is fully on screen. it barely matters what weapon you have.
when completing a tactical battle, the banner displaying what the reward is obscures the items you get. this means you close the window thinking that you didn't have any items, and they are lost forever.
made it to floor 33. having died 83 times on this level alone, I can tell exactly where the invisible walls are, since they are outlined in blood and bones.
Nice walkthrough, dev. I got to level 32, decided I was stuck, and clicked on the walkthrough. nearly 20 minutes later, I find out that the guy doing the walkthrough quit at level 30, with triple my deaths.