Frost Pond
Guide both frogs to the far bank: A starts bottom-left and needs the upper-right lily, B starts bottom-right and needs the upper-left. Select a frog, then tap an adjacent ice square to hop. Leaving ice removes one layer; thin ice melts to water. Thick ice has two layers. You can leap TWO squares in a straight line only when your partner occupies the middle square—use leapfrog to save a shared stepping stone. Three frost seeds can freeze or reinforce an adjacent square to two layers. Select Frost, tap beside the selected frog, then return to Hop. Frogs on their destination rest there permanently. Both must arrive; do not strand the second frog by melting its route.
About this experiment
Guide both frogs to the far bank: A starts bottom-left and needs the upper-right lily, B starts bottom-right and needs the upper-left. Select a frog, then tap an adjacent ice square to hop. Leaving ice removes one layer; thin ice melts to water. Thick ice has two layers. You can leap TWO squares in a straight line only when your partner occupies the middle square—use leapfrog to save a shared stepping stone. Three frost seeds can freeze or reinforce an adjacent square to two layers. Select Frost, tap beside the selected frog, then return to Hop. Frogs on their destination rest there permanently. Both must arrive; do not strand the second frog by melting its route. Keyboard: Tab and Enter/Space operate buttons; R restarts.