Loved what I played so far and looking forward to future updates with Chi-Chi! So many possibilities with Grandpa Gohan, Yajirobe and the neighbor she seems to have become friends with.
I noticed the game seems to suffer from the same issues most RPG Maker VX and VX Ace games do and that's the lag and stuttering. From what I recall its either related to the map size or the amount of events on that map but its been a good 10 years or so since I was in the RPG Maker community.
Have you thought about switching to RPG Maker MV? You'd get a better resolution and none of these bugs and its scripting language is JS and easier to work with.