Hi Sophie, I liked your spiral design, it was a creative way of getting to the end. I just thought I was a dummy and took a detour, until reading Alan's comment, I didn't actually know that you were supposed to take that path and then jump down. I just did it because it seemed like the natural thing to do.
I agree with what Alan said, it could be signaled a bit better that you're supposed to go up to the top first and then drop down and then go further up to get to the finish. However it was very clear what the end goal was from the start.
About platform size, they were tricky at times, I only fell down once but I didn't think they were too hard. A lot of times I wasn't sure if I could make the jump so it felt like a tiny victory everytime I did unexpectedly succeed. Overall nice job!