Arkanoid show score, lives. Fix NULL pointer dereference

[DevMilanIan]

What's new

• Display dots representing 3 lives on the left, score on the right. Also fixed timer not being freed and mutex deletion, however this somehow has made the game 'remember' your lives and score after exit, but not any brick/level progress. This could lead to issues but none that I have found yet. Tried a few things and had no luck, not too experienced here so any tips in the comments would be great.

Verification

• Going to the current Arkanoid game, playing until at least one brick is hit, then closing the game will lead to a NULL pointer dereference upon reopen or after a short while. Now it will 'remember' your lives and score, show them, and hopefully not crash you later.

Checklist (For Reviewer)

• PR has description of feature/bug or link to Confluence/Jira task
• Description contains actions to verify feature/bugfix
• I've built this code, uploaded it to the device and verified feature/bugfix

[UberGuidoZ]

Thanks, @DevMilanIan! If you're able to PR this over to Unleashed as well, it will get built into the base of RogueMaster and benefit even more people. =)

Though I'm sure Unleashed could just grab it, they prefer the authors to do it. Otherwise, I'd be happy to do it too, but this is yours and you should be attached to it! Appreciate it.

https://github.com/Eng1n33r/flipperzero-firmware