Instead of using and increment of .6 in the lines of code below try something smaller like .1 - this will slow it down.
dropnuke\nukexmod=dropnuke\nukexmod+.6
dropnuke\nukeymod=dropnuke\nukeymod+.6
dropnuke\nukexmod=dropnuke\nukexmod-.6
dropnuke\nukeymod=dropnuke\nukeymod+ .6
Similarly, just multiply the variables dx and dy by .1 to slow them down.
dx#=Cos(theta#) * .1
dy#=Sin(theta#) * .1
dropnuke\nukexmod=dropnuke\nukexmod+.6
dropnuke\nukeymod=dropnuke\nukeymod+.6
dropnuke\nukexmod=dropnuke\nukexmod-.6
dropnuke\nukeymod=dropnuke\nukeymod+ .6
Similarly, just multiply the variables dx and dy by .1 to slow them down.
dx#=Cos(theta#) * .1
dy#=Sin(theta#) * .1