Personally, I would probably skip one of the things you have planned for your arrival day. Looking at your schedule...(and assuming ideal conditions)...this is roughly what I'd think the timeline would look like (with the understanding that things may take longer or shorter depending on conditions and crowds).
9:00 am: Arrive at MCO (the rule of thumb is to allow about 90 minutes from when you land to when you arrive at your resort; it can be longer or shorter)
10:30 am: Arrive at Pop (assuming all goes well), check-in, drop off carry-ons, etc. Assume this takes at least 30 minutes.
11:00 am: Depart Pop for MK
11:30 am: Arrive at MK (it's only a 15 minute or so bus ride, but allow some time in case you have to wait for a bus)
12:00 pm: Arrive at Poly for lunch (again, it's a shortish monorail ride, but you have to walk to the station and then allow time if you have to wait). You could also take a boat from MK to Poly, but it goes to GF first.
1:00 pm: Finish lunch (assuming an hour and that assumes you're seated on time)
1:15 pm: Get back to MK (monorail or boat)
2:00 pm: Get to Swan (bus)
2:15 pm: Get to mini-golf (walking - probably won't take that long, but just in case)
3:30 pm: finish golfing (assume it takes about 75 minutes to play a round)
3:45 pm: Get back to Swan
4:30 pm: Get to DTD
Then it's a matter of what you want to do and see at DTD.
Overall, I think you'll be running around pretty ragged by the end of this.