I agree with others; the score in the middle is wrong. I actually think the issue with the hitboxes is that the tutorial is the wrong way around; the tutorial says hitting water will refill health and electric will shock you, but in fact the water damages you while electricity increases your score. And yeh, the speed is odd, sometimes batteries fly in and can't be collected at all, and the player movement is very slow and laggy.

A few issues:

the text is very hard to read

the speed that stuff moves at is a bit strange

the score thing in the middle of the screen is distracting

Could definitely use more polish:

1. Text is hard to read, probably because the background also has text on it, and it contrasts weirdly with background colors (red/green text on green/pink background)

2. I think something's wrong with the hitboxes, I kept dying despite not touching anything, and sometimes jumping on top of an obstacle caused damage instead of heal

3. Everything moves at completely different speeds. It's very jarring - there is no sense of cohesion between character, ground, background and obstacles, which makes it hard on the eyes and also hard to gauge at what speeds the obstacles are moving, or even understand at what speed the player is moving

4. The score counter was right in the middle of the screen, which was very distracting

Sorry if that's not what you'd like to hear, but I hope my feedback would be helpful for when you will be working on your future projects.