Sure! Here's a simple game that meets your requirements. It consists of 30 red riddles that need to be solved, and players will be rewarded with a surprise at the end if they solve all of them. The game is designed for smartphone operation and uses pictograms where possible.
This HTML file contains the game "Red Riddles 3!" implemented as a single HTML file. It uses JavaScript within `
` tags to handle the game logic. The game starts by displaying the first red riddle in a container. Once the player enters their answer, it checks if it's correct and updates the result accordingly. If the player solves all 30 riddles, they are congratulated, and the surprise message is displayed. Players also have the option to skip to the end by answering a math question prompted by the "Skip" button.