★Helpful tips:
When wall jumping, you do not need to hold down or repeatedly press the jump button — you just need to press in the direction away from the wall.
If you’ve just collected a difficult to reach key, tablet, or rune, you can always warp out of the room (by holding C or M) if you don’t want to risk walking back; warping saves your game as well. (Granite26 pointed this out in a comment, and it’s a pretty good tip)
Dog Castle by Madcoretom
犬が敵をよけつつ進む、一面クリア型のゆるいドット絵アクションゲーム
5面クリアで次のステージに。
(平均ハート数で次のステージか開放とあるようですが、最初の画面に戻ると次のステージにいけるような?) https://madcoretom.itch.io/dog-castle