As a senior citizen, I was amazed to find out how to build a CPU based on a simple NAND gate through the process of breaking up a problem into modules and combining them in creative. This would have taken a university course and I would have been bored out of my mind.

Instead, I was enthralled as I went the guided series of puzzles to solve more complicated ones using previously.

I especially like the latest update (2017-01-18) which allowed the revision of previous designs when I thought of better ways to solve problems.

Be aware that this is a text-based game. I prefer this as I do not have to struggle with a mouse.

Especially for senior citizens, the good points are:
Clear readable fonts
Engages my mind rather my reflexes
Auto-saving of current sessions
Consistent rules for solving puzzles
Comprehensive test engine to identify scenarios under which the design fails

This puzzle game has the following constraints:
Limited space for circuit specification
Strict syntax for circuit specfication
Puzzles have to solved in order

Overall, I liked the game.

As a senior citizen, I was amazed to find out how to build a CPU based on a simple NAND gate through the process of breaking up a problem into modules and combining them in creative. This would have taken a university course and I would have been bored out of my mind. Instead, I was enthralled as I went the guided series of puzzles to solve more complicated ones using previously. I especially like the latest update (2017-01-18) which allowed the revision of previous designs when I thought of better ways to solve problems. Be aware that this is a text-based game. I prefer this as I do not have to struggle with a mouse. Especially for senior citizens, the good points are: Clear readable fonts Engages my mind rather my reflexes Auto-saving of current sessions Consistent rules for solving puzzles Comprehensive test engine to identify scenarios under which the design fails This puzzle game has the following constraints: Limited space for circuit specification Strict syntax for circuit specfication Puzzles have to solved in order Overall, I liked the game.