i have the one where the evil guy escapes from the mirror and the one where i let the evil guy leave the attic, but i have no idea about the other ones ;-;

Hint: There is a hammer near the attic's exit

All spoilers:

In no particular order, these are the 4 endings:

1. Touch the mirror to transform.  Call Linda. Transform back. Leave the attic.
2. Touch the mirror to transform.  Call Linda.  Leave the attic.
3. Touch the mirror to transform. Get the hammer. Use the hammer on the mirror (drag the hammer).
4. Get the hammer. Use the hammer on the mirror.