For the first one, did you make a conf.lua file, and have t.console = true in it? (look at the wiki) otherwise, only lovec.exe will have a console by default.
For the second one, how exactly are you trying to run love files? or a better question, how are said love files packed? (you should pack the project folder's -contents-, not the folder itself)
For the last one, 11.0 normalized colors to the 0-1 range, so instead of love.math.random(255), you just want love.math.random().
Me and my stuff True Neutral Aspirant. Why, yes, i do indeed enjoy sarcastically correcting others when they make the most blatant of spelling mistakes. No bullying or trolling the innocent tho.