It's actually relatively easy if you have a lot of healing items. Also, don't waste a healing item if you're close to leveling up, as you get all your health back when you level.
Boomer can be used for 99% of the enemies with good results. The odd time flipping helps or another pixl.
The first time I went through I died on the boss, the second time I only used maybe 4 healing items.
I look forward to playing flopside, not so much for the prizes but because I find the pits a lot of fun.