The game we have is mostly exposition; the fact that the writing carried it anyway is one of our proudest accomplishments, and I'll pass that praise to Hannah.
A better tutorial for the combat system is on the short list of changes on the Road To Being Able To Charge For This. As mentioned, this was an attempt to adapt the tabletop RPG Valor: Heroic Roleplaying to RPGMaker as part of a pitch to license it for I/O, with mixed success (and I'll address that in the postmortem; this is going to have serious post-game changes). If you enjoyed the combat in this, please consider taking a look at the vastly superior source material!
I don't know what you mean by "the meme sound at the end." Could you get me video of what you're talking about? It's possible you encountered a bug, particularly if you weren't on Windows.
Oh, we absolutely plan to expand the plot - first to the actual end of the quest with an epilogue in town, and then backwards to the planned start of the full game.