Thanks for the feedback!
As for 1, I think if there was more time I would probably have an option for aiming where you're facing, or at least making it so that bullets fire the direction you're facing if you're not holding arrow keys - I probably could have done that in the time we had, so that was definitely an oversight on my part.
On 2, as a designer, difficulty is often something I mis-judge, especially for jams where there's little time to get others to playtest. I wanted to keep the game in a space where you're really forced to position the zombies for the sake of watering your plants, but I think the player should probably be able to get away with more on the easier difficulty levels, especially with regards to how many bullets you start with.
I just wanted to come back to this - I've updated the build to shoot the way you're facing if you're not aiming with the arrow keys! Now it should be much more playable with your aiming preference. Give it another shot!
