Protip: While you can't use them in battle, the effects of home-made potions do stack so before entering a hard battle (e.g. the end) you can stack infinite buffs onto yourself.
I would give this game 5 stars except for two things: 1) the lag, which makes a lot of jumps impossible and 2) that you never start level 4 with enough energy to even reach the first milk carton, meaning you can only ever play from level 3 at the latest. Since it gives you the option to start at level 4 this seems pointless and I gave up playing.