Alright, I don't want to sound ridiculous but, Original Mode is a lot harder than Insane Mode. I think I died 500+ times on Original, whereas I only died <200 in Insane. Very very very fun game though, I think the coding for it was magnificent, and UnkownJoe deserves a medal. Congratulations on a challenging, interesting game :)
A tip for killing grinders: grinders need to become orange in order to be sliced. They take 5 slices to kill, but you need to make them orange first! This can be done with the Invisible Wall Reward (first Reward on the bottom row) or by guiding two grinders into each other. This can also be done if they walk into an explosion (Grenade, second Reward on the top row) which can also be generated from the Torchie! How you manage to inspire an explosion from a Torchie, that's for you to surviv—I mean good luck! :D 5/5 game