Luiza e Pedro. Correções #21#28

[fegemo]

Corrige parcialmente #27 e #28. Precisei fazer os seguintes commits para corrigir:

• https://github.com/fegemo/cefet-games-meow-au/commit/c6bbbcf0d5b9fbd76b9ef8fb2650ea563cf1dcf7
• https://github.com/fegemo/cefet-games-meow-au/commit/dd56c29a7e710d7bc71bdcaf8ba5aab09289bf3a
• https://github.com/fegemo/cefet-games-meow-au/commit/6cd114b4e099b32acc28a51a0c6121abd3ec8934
• https://github.com/fegemo/cefet-games-meow-au/commit/0312fea61dc8a5be20c30034b076fd4632a5df2a