Hey!
For the 150-word work experience section, I'd recommend keeping it in short, clear prose rather than bullet points - however, if you are struggling, bullet points should be perfectly acceptable (unless they state otherwise). I'd focus on a few experiences that best show skills that they value - on their
'About Us' page, they list their core values which might be useful to refer to! You can demonstrate these skills through concise examples, rather than explicitly listing them.
I hope that helps, and best of luck with the application!