Holy hell this game can be frustrating. I like the premise. It's a top down shooter where you choose to increase the difficulty of each right to increase the rewards. You're going to need to challenge yourself to get upgrades for the final fight or you will be unprepared.
Being able to hold the fire button to lock your angle is a godsend. Trying to change where you are shooting can be difficult if you are being chased by something quick.
The enemies are way annoying. Fast worms and slow chasing wolves aren't too bad. Bullet shooting birds and plants (which spawn under you always) are manageable if the numbers are kept under control. Exploding pumpkin bombs that bum rush you are a menace, they have low health at least. Whales are the worst. Each group has 9 enemies and the split and spread out when hit. Spreader is necessary and it's a nightmare until you get it.
I always struggle on the second fight. You die in one hit until you buy more starting health. One mistake and you start over. It took me too long to realize your bombs refresh each fight so use them liberally.