Learning when to invade - 16k v 14k 9x9

I learn by doing so I won’t know any fancy go-language, however I would appreciate if someone more experienced than me can point out any particularly bad/good moves in this 9x9.

I personally feel move 35 was decisive and I would like to be able to understand better why it was a mistake (if it was one). Invasions seem to be an art-form I am struggling with, particularly defending them; here I feel I have done well. Could black have done a better invasion?
Looking forward to comments about this or any other move :smile:

Thanks a lot, KR

Here’s your friendly neighborhood 9x9 review: