Thanks.. I have taken care of a few collision issues, but some still remain, especially if you play with keyboard. I have also added a "you win" screen, because you're right, it was indeed a bit of a strange ending that it just said "retry". It is meant to be sort of hard yes, as there is only one level. This game was mostly a test of how ArtRage and GameMaker studio went hand in hand.
And the cat safely returned IRL after three days, btw.