Were you using the WASD to move? I did not set the game up to use a game pad.
Viewing post in Mystic Toad Pizzeria jam comments
I had a similar issue using WASD. After the first delivery I was blown left to right pretty strongly and eventually ran aground. Was I supposed to use the on screen input prompts to cast spells? I tried to follow them but never seemed to get anything to cast. Anyway, like the concept of delivering magic pizzas via boat, but I think some in-game instruction on what to do may have been beneficial!