Day One Patch! (v0.5.1)

A day one patch! That's one step closer to me being a real game dev! 

Version 0.5.1 has some fixes and changes, most are cosmetic and correct a few things:

• Hopefully-- hopefully-- this fixes the issue with the level not starting after hitting start. Or hopefully it makes it able to hit restart in the pause menu when it happens. If the issue in this version still happens please let me know ASAP.
• Enzyme shader that makes the enzyme that weird green color to red should be fixed, it now goes from no shading to red.
• I forgot to mention in the last update: I had decided when updating v0.4 to v0.5 that the powerups were a little wimpy and 5 seconds wasn't long enough since the Rebbecca animations leave some idle time between targets appearing, (I also altered the Tri-glycerides because I felt it was a little too OP compared to the other powers, plus it was causing a glitch where too many lipids drop if more than one hit at a time a target pops.) Anyway, powerups now start at 10 seconds (Hormone Spike is 20 seconds) and can be powered up to 20 seconds, each level now adds 2 additional seconds instead of 1, and the max levels have been changed from 5 to 6. I had also forgotten to update the appropriate numbers on the tutorial screen, the stats screen, and the shop. They now are correct.
• You can now hit Enter along with Esc to pause. Now it won't force you to close fullscreen to pause the browser version.
• Adjusted some prices to be cheaper and more balanced at the shop.