クロスワード DX 懸賞パズル is a free Android game developed by BTD STUDIO that offers over 3500 high-quality crossword puzzles. The game features handmade problems, not machine-generated, that are divided into different difficulty levels: beginner, intermediate, and advanced. The game is easy to play, and you can solve one puzzle a day for ten years. The puzzles are updated regularly, and new ones are added to the game frequently.

The game provides three different types of controls: horizontal, vertical, and flick input. You can also adjust the size of the puzzle to make it easier to read, and there is a mode that lets you listen to music while playing. Additionally, the game offers a monthly prize draw that you can enter by earning GP (game points) through playing. The prizes are announced at the beginning of each month and sent out in the middle of the month.

Overall, クロスワード DX 懸賞パズル is a highly enjoyable and challenging game that offers a vast selection of puzzles and hours of entertainment.