What exactly does the "Player-Size" in the title mean? I'm guessing from the pictures, but the street segment looks to be about 6 studs wide. An average Blockland lane is around 8-10 studs wide. The actual Tower Bridge has 2 lanes, which would equal roughly 18 studs. Also account for the very generously sized sidewalks on either side, I'm gonna say 2 people wide. A Blockhead being 4 studs wide, this adds 8 more studs to each side. This would add up to about 34 studs wide. This is a little less than 6 times the size of your current 6 stud wide street.
The next issue is the height. Google says the Tower Bridge is 213 feet tall. I have no idea if this is from street level up, sea level up, etc. I'm assuming Street Level because as you'll see shortly I doesn't matter much. Guessing the average Blockhead is 6 feet tall, this means the Tower Bridge is roughly 35 and a half Blockheads tall.
I'm not good at math but I'm pretty sure that's not thirty five.
As a lot of people are saying, this is extremely similar to the official Lego Set. The problem here is that Lego set is clearly a much smaller scale, using Lego Minifigs for reference. Blockheads and Lego Minifigures a very similar in size and scale. This means that, were this same set recreated in Blockland, it would still be much smaller than Blockhead scale.
Looks nice though good work.