It's a big problem with amatures using DSLRs.
Give them time. Most of us are young and unschooled trying to figure this shit out together. This guy makes a focussing mistake, we notice it and he never makes it again- neither do we. In 6 months time he'll know his camera inside out and be a pro, technically at least.
Would you want to see a second Fish Food?
Yes, sure. The atmosphere was good enough to watch it again.
However I do like the open end, leaves it open for discussion.
Yes, it's difficult for me to explain what I mean. Open endings (like the end of Lost in Translation and many X-Files episodes, for example) are good, but you need to see a couple of, uhhhh, themes, trajectories, character arcs, and wonder where they're going. Breaking them off early is fine, but we need to be left wondering which way will they go, how will they collide. You need to have at least two elements that are going to smash together in unpredictable ways. In your film I didn't see that, but it wouldn't be hard to insert something.
For example, what if the handicapped guy's hard big brother, and his mates are going to come and pick him up in 20 minutes? You've just added some easy tension. Maybe he sends the main character a vaguely threatening video message on his Iphone, telling him not to manipulate his little brother or he'll smash his fookin head in. A factor X that'll leave us wondering. It's not like you have to insert an
extra scene at the end, an open ending's fine, but it'd be best to insert an extra element or two, so we're properly left hanging, instead of half scratching our heads half shrugging.