Since official app stores for Java phones are dead (e.g., Nokia Ovi Store, Samsung Apps shutdown), you must side-load:
The surge in popularity for "touch screen" Java games marked a transitional period in UI design. Most classic J2ME games were designed for keypads—think directional pads and number keys (2, 4, 6, 8). Java Games 480x800 Touch Screen Download
When large touch screens hit the market, developers had to scramble. This led to a unique genre of gaming: Since official app stores for Java phones are dead (e
Original app stores (Nokia Ovi Store, Sony Ericsson PlayNow) are gone. Your best sources are archival websites: Nokia Ovi Store