if you haven't already it's a good idea to link to or distribute RTP alongside your game or on its page--even if it cuts down the size of your game by a lot, it is true that not a lot of people have it on their computers. i worked around this by using custom assets and if you choose to go back to do this you can have the added benefit of avoiding the need for RTP downloads altogether.
it's really awesome to see you again this jam, and great job on finishing a game!! rpgmaker is one of my favorite engines and i'm glad you also enjoyed working with it!