Hit Alt + Enter to make the command screen "full screen" (as far as Windows 95 is
concerned). This should restore the display from the garbled mess you see and allow
you to access the command prompt. Press Alt-Enter again to leave full screen and go
back to a window mode. (Thanks to @DisplacedGamer for that wisdom)
On the app's home screen, select "Settings" in the lower menu. Then, delete your machine's state before starting it again - this time hopefully without issues.
If you are running macOS, or Linux, you can probably "mount" the
virtual hard drive used by windows95 to add files. Hit the "Modify C: Drive"
button, which will take you to the disk image.
On macOS, double-click the disk image to open it.
On Windows 10, Windows will think that it can open up the image, but will actually fail to do so. Use a tool like OSFMount to mount your disk image.
On Linux, search the Internet for instructions on how to mount an img disk
image on your distribution. It's likely that you'll be able to run mount
with the image as input.
Username: windows95 Password: password