Bit iffy on the third panel, not really sure what is wrong with it. Also any general input would be great as well.

Overall the comic looks a little busy to me. With the background hatch lines, text, and the transparent characters, my eyes are getting a little confused about what's the main focus. Try fading out the background hatching and text on panel 1, 2 and 4 so we have a clearer view of the characters and what's happening with them. You also need bigger text in that 2nd panel. Consider blowing up the square bubbles so they fall partly outside the panel border. That will give you more space for the text. You always want to make sure your text is readable on mobile, since that's how most people view comics these days. This definitely wouldn't be. Word balloon text should also be all the same standard size, unless something specific needs to be emphasized.

If you move the "What is life" panel to the top or to the bottom, your comic could take up the whole width of a phone screen, so the comic would be more readable. Let me know if any of that doesn't make sense!

For the 3rd panel, it took me a while to figure out that it was the cat face in the background. I was seeing the whiskers as the tops of his cubicle receding into the distance. Maybe just moving the face up a bit, so it doesn't touch the lamp would make it more clear.

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