Awesome designer is looking for a full time position at a startup in SF.
docs.google.com
docs.google.com
Anyways, yes, as far as constructive criticism goes, HTML would be a better delivery, and spellchecks are always good. You may consider revising that ONE line a little, but I hardly see it qualifying as trashing. You're letting potential employers know your reasoning for why you'd leave a startup, which is something I think a potential employer would want to know, and opens it up for discussion.
I agree in concept listing the reasons for leaving a startup however any HR person can tell you that it doesn't look good to put any concrete negatives on a resume. Doing so frequently indicates to hiring managers that there will be a likelihood of doing the same thing to them.