Best way to beat the boss... upgrade all but cargo on the boat to 5, and cannonball shield and shooting gallery on weapons to 4 or 5.... and then get the ram, lvl 1 works... when you go in kill your speed just in case it puts you toward a wall. then ram the four corner dudes, kill your speed n hit em with 3 cannon balls[this should kill them... then just go in circles shooting at the boss [if you have armor 5 should be no problem just try to stay ahead of the fireballs when the heads turning and presto ur done
if you just want to get the card ... save ur monry buy the max available gun, then shield then gun the 2nd gun u get is a shotty and will kill the boss easily with some well placed jumps
easy easy easy.... just hit the platforms and when u hit the ground use all ur fuel to try n extend ur time... after that all u need is the band and hieght 2nd highest full rocket and u need to hit one green or gold platform.... boom in space
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Hoping to revisit this someday myself, in the meantime look forward to some new prototypes soon!