gosu c++ tutorial: https://github.com/jlnr/gosu/wiki/C---Tutorial

compile with: g++ -fopenmp -03 main.cpp libgosu.a gosu-config --libs -o my_game

to profile, make loop stop after n rounds

g++ -fopenmp -pg main.cpp libgosu.a gosu-config --libs -o my_game ./my_game gprof my_game > gprof.output