This is really nice, especially for your first ever Godot game! The core gameplay loop is pretty fun, and I liked how distinct each enemy type felt in terms of how they moved and how they attacked.
Just a heads up, you may want to add labels or different designs to the differently colored potions to further distinguish them. As of right now, distinguishing the potions only by color makes this portion of the game less accessible to those with colorblindness.
Other than that, nice work!