So, as an adventure, this is something of a Death House scenario where the players can only be inside for a limited amount of time for various reasons. As they explore the structure, solve the traps and puzzles, and kill the various monsters, they can progress deeper faster, allowing them to go deeper into the building and eventually reach the end.
This seems like a fun idea. It also seems somewhat system agnostic, so if you are using a custom system of your own, it shouldn't be too big of an issue so long as your system is built well enough. If you want feedback on your system, it would help for you to post some areas of it you would like feedback on. You say it is similar to D&D, but that really doesn't describe it very well as lots of systems are similar to D&D. What makes your system different? What rules are you most concerned about in conjunction with this adventure? What are the weaknesses of your system that you would like feedback on?
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"The mongoose blew out its candle and was asleep in bed before the room went dark." —Llanowar fable
So, as an adventure, this is something of a Death House scenario where the players can only be inside for a limited amount of time for various reasons. As they explore the structure, solve the traps and puzzles, and kill the various monsters, they can progress deeper faster, allowing them to go deeper into the building and eventually reach the end.
This seems like a fun idea. It also seems somewhat system agnostic, so if you are using a custom system of your own, it shouldn't be too big of an issue so long as your system is built well enough. If you want feedback on your system, it would help for you to post some areas of it you would like feedback on. You say it is similar to D&D, but that really doesn't describe it very well as lots of systems are similar to D&D. What makes your system different? What rules are you most concerned about in conjunction with this adventure? What are the weaknesses of your system that you would like feedback on?