I'm glad to hear you're having a bun-tastic time, as well as enjoying the updated crank control options, and the slight revision in the 1.2 update!
I think that the question on spike invincibility might be just the tip you'll need to complete 3-5 with! When holding a plant, the few seconds of invincibility take place, but if empty-handed, you'll lose a life right on the spot. The trick to 3-5 is really about determining just where to either jump or fall across gaps, and collecting enough Pikk-Plants to navigate those spikes! Good luck with the level!
And, thank you for the great comment! 🐇