Start with creating a small dictionary of different words. Store them 
in a list at the top of the program. Then select a random number up 
to the size of the dictionary and use the word at that position as the
target word. Convert the word to a list of characters (split on //).

Next, initialize variables which are necessary for the game: a counter
holding the number of attempts left ($attempts, starts at 7), a counter 
for the number of identified characters ($found, starts at 0) and a list 
holding the identified characters (@found, starts with an underscore for 
each character in the target word).

The main game loop should process user input until either all characters
have been found (test by comparing $found with the length of the target 
word) or no more attempts are left (compare $attempts with zero). The 
obvious way to implement this loop would be with while(). 

Inside the game loop, the current status should be shown (print the 
contents of @found) and the user should be asked for input. Then a 
smaller loop should be started in which each character of the target 
word should be compared with the user answer. If a match is found, 
then the identified character counter $found should be increased and 
the answer should be inserted in the right position in the identified 
character list @found. Furthermore the character should be removed 
from the target character list (replace by underscore) to avoid 
duplicate identification. Finally a variable should be set to signal 
to the program that a match has been found.

Note that a word can contain duplicate characters. So after the first
match, the small loop should continue and try to find more matches.
For each match all the described steps need to be repeated.

After the small loop, a message should be printed which states that
the user's answer was either correct or wrong. If the answer was 
wrong then the number of attempts left $attempts should be decreased.

After the main loop, a test of the contents of the identified characters
counter $found will reveal if the target word was identified or not 
(compare with the length of the target word). Print the message 
corresponding to the outcome of this test. In either case, show the 
target word to the user.