There could be many reasons that minecraft is not responding.
You need to improve your question with more information before any of us can help you.
Some ideas:
Your computer is low on memory (try restarting)
Minecraft has crashed (try re-opening Minecraft)
You have incorrectly installed a mod
nose isnt working ,while the part isnt responding........ ect
It isnt a seed, you have to download it.
This isnt minecraft....
You do not get minecraft on the PS3
uh....isnt it obvius? no ( not on minecrft but yes on Lol )
on the next update but there isnt a date set for it right now
it isnt No flippin' idea. The black screen, with giant white letters, it's very annoying.
The answer is right on the minecraft.net site genius. It is an out of date classic version of minecraft, lag-o-saurus as I would say. Get minecraft, it isnt that expensive, unless your REALLY poor to the point where you probably stole the computer your using to ask this.
This means that Java isn't responding. You can fix this by closing Minecraft, and then reopening it.
There isnt a command for health boost. If you can get a plugin to do so then set it as @p healthboost 1000 (guessing thats the command)
Make sure the plugin isn't outdated, and check what your console says.
When notch created it if ur lookin for a date sorry dude there probably isnt a REAL one. Wiki answers with a date they think is correct but they dont know when minecraft was really made for all we know notch has created 3.9 and is releasing little bits and pieces at a time!