I agree that I need to work on better progression and rewards for the player. I had initially planned on two enemy types, one ant and one flying bird which swoops in from above & one final boss when you reach max level at the end but I didn't have enough time (over scoped as this is my first jam, & had to cut down things quite a bit).
I will also try to fix the potion spawns later, right now they're just using the ant spawner (to save time) but they don't move away from the spawns like the ants XD.
Thank you for trying my game and giving feedback! I will also try your game and give feedback later today/tomorrow when I get some free time.