I go back to this about every 2 weeks. Last week? I was playing a ton of games. This weekend? My son was needling me about getting this project going a bit - he's definitely been interested in playing. Problem was? I had the custom code mostly in place, but untested and I had all of the pretty but relatively useless intro stuff in place, but no real dungeons yet.
Now for anyone who's used RPG Maker XP, they know that the basic systems are... well, super basic. Combat is a fight/skill/defend/item affair. Now most of the scripts I used? I did not write them. I did however have to modify a lot of them to get them to play nicely with one another and my own customized stuff. So now the combat includes things like Overdrives, Summoning replacement creatures and gear that can have spells cast off of it. Getting all of that debugged was most of my Saturday evening.
The other thing that I decided to do was work in a lot of branching paths and choices - for example either, both or neither of your siblings may survive the early going, which obviously affects some of the cosmetics to the storyline, but also who becomes available in your party. Which reminds me - I need to work on the party switching script next...
Anyway, that said, even with me knowing right where to go, I would say the game took me about 20-25 minutes to get through chapter 1, and it took my son about 35-40 minutes when he ran through it. I figure if it reaches 3-5 hours in total, I met my goal. Anyway, the video's nothing special, but I put in the last stage of the first real playable cavern, showing off some of the scripted events and combat options.