Well, that's boring.
Yes, it does not break my mouse unlike clicker games, but on the other hand, it requires your attention and a lot of patience. Scoreboard is a good idea (if you can get it working), so players can compete with each other, but there's not much fun in running around collecting the exactly same items in order to purchase updates to collect even more of said items.
Yet you have a great foundation, if you wish to improve it.
You could e.g. warp the terrain, so there would be some obstacles (and add jumping, because that's usually what Space does in 3D games). Then it would feel *almost* as collecting coins in platformer games.
You could add more kinds of bricks (e.g. a chance of spawning gold brick with value of 100*someCoeficient points, which slowly fades away if you are not quick enough)
You could have powerups, e.g. every 100th brick, you could unleash powerup of collecting everything in line in front of you; every 500th brick, collect every brick on the ground (of course, the magnet upgrade already does this, so you might want to think about something different).
Stuff like that – just add something which is not directly related to collecting bricks, or the game will feel quite shallow ("Street sweeper simulator 2").
As for other things, is there a max count of bricks that can be in the game? While writing this review, the scene got a bit cluttered and I imagine, theoretically, if I left the game running for an hour or two, it could get pretty laggy and messy. And some of your potential players will want to do that in order to collect loads of bricks at once with minimal effort unlike "honest" players who run around collecting bricks as they fall one by one.
Also, shop screen is (I assume) a jpg with visible compression artifacts (try png instead), text overlaps upgrade icons (wheelbarrow) and development build is not ideal for release (slower, larger).
And I feel it would look much better if the long distance bricks were dragged towards you instead of just simply disappearing.
So far it's an okay game, but not something anyone would want to spend more than a couple of minutes with.