Under a syllable rule, casa → sapo joins sa to sa. An activity using the final letter alone could connect casa → árbol by “a”, but that does not satisfy the syllable rule: árbol does not begin with sa. According to its product facts, Alicia uses syllables; the letter example is an editorial comparison, not another app mode.
Check the complete syllable
In ca-sa → sa-po → po-zo, the links are sa and po. Casa ending in the letter a is insufficient: its full final syllable is sa. Likewise, looking only at the first letter of pozo does not explain the po link. Keep the Spanish examples, since translation changes the links.
These words illustrate the rule. We do not know whether they appear together as Alicia cards. An adult can explain an unfamiliar word and compare its ending and the next beginning with a child; this is a suggestion, not a promised automatic feature.
Play together with Alicia
The facts describe a local Spanish-language game. In family mode, Peque chooses among three cards with drawings and syllables and Adulto among six text cards. They form a cooperative chain of ten links, and Peque checks the connection after each correct adult answer.
In Rally, Peque proposes a word and Alicia continues. Words remain visible and audio is optional. Alicia is in development for Android and has no public download yet; check the project status. The cover is AI-generated, not a real screen.