a very good castle with a resturant and a swimming pool and a huge stable with a horses and a amusement park

This is just a little maze I built in my spare time. It's also the first world I've ever built in Minecraft, ever, so any tips or pointers would be gladly appreciated, and if I'm doing anything wrong go ahead and tell me.

Phazez!
Phazez is a Portal type problem solving game filled will parkour, swimming, Monster Fighting and more! Travel through the 7 Phazes and try not to die as every phaze tries to kill you in a different way! The game is updated regularly and is getting better and better! download and play now!
Minecraft Version: Java Edition 1.12.2
Game Version 1.6.3
A Map by: Fire Game Studios & WolfPup Games
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Now updated to 1.6.3 Coming with:
-Command Block Performance Update

Version 1.6.2 Came with:
-Bug fixes
-Minor Changes

Version 1.6.1 Came with:
-Bug Fixes
-New death room

Version 1.6 Came with:
-Phaze 7!
-Spawn changes
-Bug fixes!
-Map changes
-Main room redesign
-Test Subjects

Version 1.5.4 Came with:
-New spawn room
-Phaze 4 changes
-Changed and added some blocks to make it all look nicer
-Bug fixes

Version 1.5.3 Came with:
-Bug fixes

Version 1.5.2 Came with:
-Titles on game opening & each Phaze.
-Lots of command block fixes
-Changes to the starting rooms
-Dialogue timing improved
-Bug fixes

Version 1.5.1 Came with:
-Bug fixes

Version 1.5 Came with:
-Whole map face-lit
-Spelling errors on signs fixed
-Updated Phaze 5 majorly and made big changes
-Story Changes
-Tons of other minor changes
-Bug Fixes

Version 1.4.5 Came With
-Bug Fixes

Version 1.4.4 Came With:
-Spawn bug fixes
-You now keep your inventory when you die!

Version 1.4.2 Came With:
-Spelling errors fixed
-Username does not show in chat anymore
-Small bug fixes

Version 1.4 Came With:
-Phazez Story Line
-"Robert" Testing Instructor
-New Roof
-New Floor
-Changed Phaze 6 (Only a Little)
-New Spawn Look
-Startup System
-Fixed command block problems
-Added Golden apple's to start up equipment
-Removed Credits
-Fixed Phaze 6 lighting so monsters can not spawn
-A whole bunch of bug fixes!

Version 1.3.4 Came With:
-Spawn bug fix

Version 1.3.2 Came with:
-Bug/build fixes
-Command block performance update

Version 1.3 Came With:
-Beacon Roof added.
-Phaze 6 Added.
-Bug Fixes and Improvements.

Version 1.2 Came With:
-New game ending.
-Updated general look of things.
-Formated to Minecraft 1.9!

Version 1.1 Came With:
-Phazez sign fix.
-Major Monster Games Changes.
-Sign/spelling errors fixed.
-Phaze 1 ladders fixed.
-Made dropper harder.
-Updated general look of things. :)

1.0 Was the full game release.