Please vote the more you can for my screenshots on the info page of www.blitzbasic.com some cruel people put 2/5 instead of 4/5 or 5/5... But why ???
First of all: I didn't vote for your images one way or another. but since you're asking why some people gave you lower ratings, here's my thought:
The models and textures seem decent enough, however: On my computer (and others too, presumably) some of your screenshots look extremely washed out and flat.
The bloom effects greatly oversaturates part of the images, and on some computers that will look really poorly... It might be better when things are in motion during the game itself, but as a screenshot the effect translates poorly. If someone doesn't care for that washed-out bloom 'look', it means that you're more likely to get low ratings from those people.
(After all, one should use effects like that to improve the visuals of a game, not use an effect just for the sake of being able to say you're using effects)
Anyway: 5/5 would mean that it's perfect, 4/4 is good but with some room for improvement, 3/5 would be an 'average' image (not bad, not good) -- a 3 doesn't mean it's bad, just that it's nothing special.
As for the 2/5 -- someone either didn't like the image at all, or tried to tell you it needs some sizable changes.