Bob, that's really a good idea. It's good to see you posting something constructive.
I'm of the opinion the park should have two entrances, at least. One at either end.
If the current alleyway entrance is to be kept, it should have a bright, attractive new facade at the STREET, not way back.
The current setup might as well say "Hey, come down this dark, shadowy, unattractive alley to get to something that might not be much better."