Once you play Tower Mode, you'll be able to unlock Puzzle Mode and Ex Puzzle Mode, both of which add an element of pressure to the game, as they insert a new row of tiles to the board each time you find a word. If your tiles reach the top of the board, the game is over. Finally, there's Rush Mode, which feels a bit like Tetris as it inserts tiles intermittently, as time passes. All of the different modes are addicting and challenging in their own unique ways.
If you have a friend with SpellTower, you can also try the frantically paced multiplayer mode. Each time you find a word, the game drops a handful of letters on your opponent's board. The idea here is to keep your tiles from reaching the top.
One thing I love about SpellTower is its look and feel. For a simple word puzzle, it's beautiful, with its clean, minimalist lines and bright color palette. It even offers both a light and a dark theme in case you want to switch things up.
In future updates I'd love to see more game stats. As it is now, SpellTower keeps track of your highest game score and best scoring word. But it would be great to see more detailed records that indicate how you're improving over time. Because SpellTower is mostly about challenging yourself to score higher, these types of statistics would be fun to look at. Also, a wider variety of "special" tiles might make for some better game play.
Typically, puzzle games and word games have high replay value, and SpellTower is no different. What's more, though, SpellTower comes with four different puzzle modes and a Wi-Fi multiplayer mode, giving players even more to come back to.