I did some searching for your issue - I couldn't find anything. I assume that you are using vanilla version of the game and didn't mess with any options except for sound volume. I also assume you saved your progress, then
closed the game and started it again
moved saves out of their directory, deleted everything else and downloaded the game again and moved saves back in, and tried again
Turned off your computer and turned it on again and tried the game again
Finally, I assume you don't have problems like this with other RPGM games.
Below are the screenshots of all the quest screens (v0.03.3 from mega, WIN version) - I redownloaded the game and played from the save in slot 20 through to the end to get these for you, hope they help.
I think theres no new H-scenes in 0.03 for her I think there is one you could technically count but I don't think it's what you are looking for you do get some development for her but next update focuses more on her, pretty sure breadman said every update would have some Leslie content though, and next update focuses a lot more on her from what I have heard so far. This update seems more like an intoruction to a ton of new characters so you should still check it out!
Hi, i'm stuck in the early of the game. After taking the box with the meds, it ask me to go to the appartment across mine. But when i go, it's saying to me that i can't go there
I think you are misunderstanding where the the neighbors apartment is, when you walk out of your apartment just go straight to the right, dont even go down the stairs. Its the same building, not the one with the red roof.
Without knowing the specs of your system, some ideas (from easiest to hardest fixing):
update video drivers
update sound drivers
update OS
Not enough RAM/too many processes open
Old video card?
Old computer/hardware?
Also, this may sound weird, but I know it has worked with some Ren'Py issues (yes, I know this is a RPGM) - plug headphones/speakers into the 3.5 mm jack. If you normally use USB/Bluetooth speakers/headphones and don't use the 3.5 mm jack, sometimes some game won't start properly because it doesn't recognize audio device available.
The characters and situations in this story being purely fictitious, any resemblance to people or situations existing or having existed can only be coincidental.