this is a very nice game and i have a idea.on some tiles it is raining but in the battle is nothing,so lets put the rain in the arena weather with penaltys.
Rain=bloons move faster;
snow=bloons move slower;
fog=lower range;
sunny=nothing.
the weather react to some towers like:
rain=glue doesnt work;
snow=ice monkey gets stronger.
thank you that you take your time to read all the comments