3 day Busan itinerary - can it be done?

Hi! Looking for some thoughts/advice.

Wondering if this itinerary can be done in 3 days?

I have a total of 4 days booked in Busan and an additional day for a day trip to gyenongju. My thoughts when mapping out the itinerary was if I could do it in 3 and I could have and use that additional day for gyeongju. Making it 2 there. If not, I’d stick to my original plan of spreading that itinerary over 4 days and just having the one at gyenonju.

Note: I could also add Gwangli beach as an evening activity on day 2. I’ve just placed it there for now

Additionally: has anyone done the skyline Luge? Would you recommend?

Hi! Looking for some thoughts/advice.

Wondering if this itinerary can be done in 3 days?

I have a total of 4 days booked in Busan and an additional day for a day trip to gyenongju. My thoughts when mapping out the itinerary was if I could do it in 3 and I could have and use that additional day for gyeongju. Making it 2 there. If not, I’d stick to my original plan of spreading that itinerary over 4 days and just having the one at gyenonju.

Note: I could also add Gwangli beach as an evening activity on day 2. I’ve just placed it there for now

Additionally: has anyone done the skyline Luge? Would you recommend?