I think the map is a little bit on the low quality side. Of course this is your first map (as far as i know) so I don't expect it to be like Yokai's maps, but I like the idea, not the shape of the map.
The map, for starters, is not exactly the most eye appealing. There are 3 maybe 4 squares of rooms with various mini-games (which i will get into in a minute) that are small compared to the room. The ceiling is a little too high and the "vents" (the things leading around the jail) are a bit big. These, however, I am sure you can improve.
The mini-games are really good though! I haven't seen a lot of those mini-games on eGO before, which makes your map unique an worthy to play! For example, the high dive and ladder jump. I haven't seen those before on the jail server.
I don't know if there are any more hidden weapons than the ones in cell block (I haven't played the map much), but I think there should be more room for rebellion as the map is a bit too big itself. Sneaking off is not exactly the easiest thing to do. I find the map a little too into the mini-games and less on the "jail" part.
The cell block is very open, which I am not very fond of with the lack of detail and wide space, so you can't start rebellions in cell block unless you have the pistol or if you exit by the boxes. You can't sneak off or do anything tricky in cells. This is not a big deal, but a smaller cell block would be nice.
Overall, I rate your map a 6/10 in my opinion. Could use some work, but willing to play.
