Before I begin, a question: were all of those
tense errors, or were you just converting the story from past to present tense?
I just think the story sounds better in the present tense.
I probably should have explained that. Plus I need the practice working with verb tense, so I took my hand at it.
I think it works better in the present tense because then it is a story describing events as it happens. In the past tense it sounds more like a
flashback or a memory. Which in the story you present here doesn't really work in the tense. Just my opinion though. You can go whichever way you want, of course.
There are a couple of spots where you use the present tense. If you rather have me point those out instead.
If you don't want to, I will change my critique to eliminate all the verb tense changes.