the idea of the game is pretty funny. I like how  instead of runing around and collecting coins you're just standing there (especially once you have the magnet).

On the bad side well... you're just standing there and waiting (especially once you have the magnet - again) ;)

but still it's a cool "concept game".  I like it a lot! I got all the upgrades and I guess that 'no ending' goes really well with the entire game idea. 

Nice. I enjoyed it, got all the upgrades! :D

This is a good start.  It has some fun features that could be expanded to make the game better.   For example, you could add bonus points for catching the coins on the fly.  You could also add some "non coin" objects to avoid, making the challenge a little harder.

But it's a good beginning, so you should continue working to upgrade it.