Hi there.
First up try not to worry!
When I was starting out with weaning William we had all sorts of experiences like the ones you are describing and we still do and he is now 10 months old and eating all sorts of things - but we still have hiccups.
Will went through times where he would blow all of his food back at me.. he would spit it out, he would hit the spoon away etc etc but each of these things only lasted a while and passed.
If I were you I would keep persevering with a cereal he liked before, if he wants a spoon to play with and that works thengive him a spoon, he might like you to play aeroplanes or trains with the spoon and make eating more fun ... the phase of him refusing it will pass and he will soon be gobbling it up again. If you give up he will never get used to it.
If he doesn not each much breakfast for a few days or a couple of weeks don't panic but keep trying. Most of his nutrition should still be coming from his milk so he will be ok.
Good Luck!
Helen xx