Thank you for your feedback!
As the game was originally targeted at the desktop version - the mobile version is underdeveloped and has a number of problems. But with time they are fixing many problems and soon all players will be able to play the game fully from mobile devices.
As for the content - they are already making new modes for the game and maybe as early as this week or next week they will bring them into the game!
Join our official discord server - https://discord.gg/6JDfdQmFD2