Looks so neat, retro and clean. I like the design(I like the plain design, even without any css)
Your page is responsive in heart, but that textarea my dude! that boi is a heart attack.
You set absolute width size for textarea, please don’t. just check how does it look when screen is small:
check that textarea boi how broke the layout, so bad.
Using placeholder, labels for inputs are great, very good.
The combobox comes without any default and disabled option (for example “select one”, or whatever), this may better be added.
One issue is about the element spacing. Please add some spacing between elements.
Same about padding/margin for main form, I think it’s too much for mobile. let it fit with screen in mobile to use maximum space for page content.
I believe these fix are very easy to apply indeed. you can do it.
Also suggest you, you may have a quick read on survey form challenge walkthrough that contains all of these notes I mentioned about issues there too with more explanation and sample codes.
Keep going on great work, happy programming.