Oooh, I'm getting "Riki's Inflation Game" vibes here.
Speaking of, in my opinion the inflation should come with "levels" (ie sizes. Level 0 is regular, Level1 gives you a higher jump boost, Level 2 makes you float up but makes you small enough to maneuver through the traps, Level 3 is the full inflation like in the demo. Maybe Level 4 would make you a HUGE target but you can flat through the air).
But that's just my suggestion and opinion.
Looking forward to seeing this game develop further. ^^