This was so fun! I like how simple the rules are, but it gets deeper when realizing multiple tricks you can pull off. Such as x0 to reset the number, x9, x8, x7 consecutively to blow the numbers up, etc. Also having the limited number of numbers (lol) really encourages to act fast.
One thing I'd wish is to make the tasks more balanced. For example getting the task 'bigger than 8623900' followed by 'smaller than -235861200' was quite nasty, unless I'm missing something. Also the task 'contain numbers X and Y' felt much harder than the rest.
Great game :)