For Transportation in Macau

I am afraid not. You are advised to skip Macao Tower and St. Lawrence Church. You may arrange your itinerary this way: Ruins of St. Paul's- Senado Square- Wine & Grand Prix Museum- Kum Iam Statue- City of Dreams.
Have a nice journey!

Thanks for taking the time and replying :)
I think I'll skip the church and the tower then. Are buses/public transport systems available for all these areas? Could I get like a one-day bus pass and keep hopping on-off buses while travelling?

Yes, you can easily get to these attractions by bus. I am afraid that there is no one-day bus pass. But you can buy a Macao Pass to ride the buses. The pass costs MOP 30, and is available at 7-Eleven Convenience Stores, Circle-K Convenience Stores, US Mart, etc. Have a great time! :)