poison toads aren't taht hard, esp. as aero. just jump and duck. also, that's why you buy the healers and even so damage isn't much. Dieing isn't that harsh-you lost nothing
Gerbil, I haven't paid a penny for the game and it doesn't make a difference. sure, I don't get an extra ten levels, which in this game isn't a TON of bonus, and you don't get the sprocket set, but outside those two things you actually can do basically everything else.