What to do in half a day in Singapore?

I’ll be in Singapore for half a day and one evening in March. What do you recommend I see? I was thinking of Garden by the Bay, Cloud Forest, Flower Dome, the OCBC Skyway, and an evening show: Garden Rhapsody and Spectra. End the evening at "Ce La Vi". Does this itinerary seem doable? Any advice is welcome. Thanks

save a little time to "visit" the airport too (Jewel)

I was considering Garden by the Bay,

Yeah, it's worth a visit... it'll take about half a day. It's huge, this "garden"!

Thanks so much

Yeah, I’m planning to visit the airport the next morning before my 2 p.m. flight. Where’s the best spot to see the Jewel?

Jewel is the entire area of the airport that includes the waterfall/forest and the other attractions (canopy, net, etc.), so you go to Jewel and then do whatever you want there. The waterfall and the "forest" are free, but the other attractions are paid.