ok ok i worked out how i did it now... basicly
get yourself the ak-47 gun *the one with 30 shots*... get yourself a cannon that can fire you into space...
anything else isnt really worth it...
before you fire yourself... make sure your pressing *W* and *D* (up and right)
then fire yourself at a good angle so your moving fast + in / can see the edge of space... then when your about to fall downwards... shot yourself so you pop back up... dont do it to quickly otherwise it wont be worth it... try to fire just the one shot... and as you come back down... fire again... you should get over 200+ feet *i asume* out of the screen... then keeping your fingers on W and D just bounce... you will get to 183 feet out of the screen and every time you bounce you will return to that height...
hitting anything good will cause you to go faster... but you will always return to that magical 183 number... also if you hit the fire creatures you will also return to that number... spikes dont hurt you when your travling that fast... its a easy way of getting the sun medal as you will always be passing through that area twice with every bounce...
:3