There are a lot of mobile games out there for Smartphones, and most of them have free versions and some of them are really really good. What are you playing? What do you like or dislike about it, and what if any inspiration can you draw from it?
Big Duck Games LLC
A quirky game of connecting dots without cross the lines. While basically just a puzzle game, the way the patterns come together makes me think of circuit boards, or combination locks to virtual doors. If you know the puzzle you get past it easily, if you fumble with it long enough, activate security investigation and possibly countermeasures.
In game use? Bring up a nice vicious puzzle on a tablet, hand it to the PCs and start the timer. If they get it perfect, no alarm, if they get it but not on the first try, there is a snoop sent out, and if they run out of time, security countermeasures are deployed.
This one I like, you build a dungeon, populate it with monsters and traps, and you raid other people's dungeons while at the same time making yours strong and dangerous enough to repel, intimidate or devour the raiding parties from other dungeon keepers. There is some flak over it as fans of the original PC games hate the mobile version and its freemium model.
The inspiration is obvious as you are building a dungeon. The challenge comes in creating dungeons that are not difficult to penetrate, but impossible to penetrate, while working with certain limitations (all rooms must be connected, rooms cannot touch, some units fly, etc). The multiplayer option also forces dungeon innovation because if you have a weak point, other players will find it and exploit it. Viciously.
Which gives you the option of making the biggest collection of traps and nastiness look like an overlooked chink in the defenses.
My dungeon is the Shark Tooth Vajina Dungeon. It eats lots of monsters and unwitting victims
GI Joe: Battleground
A standard collect the cards game with fusions, card leveling, and activated abilities that range from advanced attacks to calling in strikes from classive vehicles. Bonus is you can play both the Joes and Cobra, and can mix forces. Unlike other such games, there are maps, where you pick your path, item drops, boss battles, etc. I am particularly happy at the moment as I have a full Cobra team consisting of Baroness (starter, automatic elite) Cobra Commander (lucky rare drop) and Destro (log in bonus).
Nostalgia on high, explosions, but the interface is clunky, and I'd like to skip some animations. I like running the team and skipping the camp from the old series and going straight to the action. In the show my above team bickered, squabbled, blamed each other for their failures and kinda sucked from episode to episode. In the mobile game Baroness frequently employs Cheap Shot special attacks, calls in POGO artillery, Cobra Commander raises attack and defence values for the entire time, and Destro has a Bullet Storm attack that hits all enemies, and also calls in POGO artillery. Boom shaka laka
Hellfire: the Summoning
A classic fantasy style collectible card game. Runs the standard common uncommon rare card tropes with solid artwork. I like the game for said artwork, and for the cooperative gameplay. There isn't a versus mode where you fight other players, which is good because on that level I am at best a casual player and in such games generally get my clock cleaned on a regular basis. I don't have the time to level grind, and wont spend the money to buy my way in.
Artwork provides the main interest, and there are regular themed events.