It would be easier to just activate/deactivate spells with 'qwe' and then apply them with LMB, without any need to use 'space'. E.g., player sees fire+water enemy -- presses 'q' -> presses 'w' -> attacks with LMB -> enemy destroyed. Water+water -- presses 'w' -> attacks once -> presses 'w' again -> attacks -> enemy destroyed.
It would be easier to just activate/deactivate spells with 'qwe' and then apply them with LMB, without any need to use 'space'. E.g., player sees fire+water enemy -- presses 'q' -> presses 'w' -> attacks with LMB -> enemy destroyed. Water+water -- presses 'w' -> attacks once -> presses 'w' again -> attacks -> enemy destroyed.
Color scheme and texures are nice.