The game itself intentionally puts a unique mechanism that you can't see in other games. If you play it like other normal turn-based games, you can barely clear it.
Although there is no separate indication, if you enter the enemy's range from an empty lot, you can calculate that the game will explode by looking at 25% per enemy. However, if there is a wall, this probability is subtracted by the complexity of the wall or the size of the wall.
And since the number of cards is limited, if you waste an enemy that can be killed with only one card and kill it with two or three cards, it may not be able to hit one and it may be difficult to clear it perfectly. Therefore, it is good for stable play itself to raise a confirmed deal that is easy to calculate. Of course, to match the balance, in the case of a random deal, it was designed to have a fatal damage in case of a critical blow.
In the past, the effect of armor only blocked positives, but it was upgraded to protect certain deals. Instead, the armor piercing effect has been increased from 50% to 100%. The play has been reorganized to utilize more armor piercing characteristics.
And if you enjoy going to the hospital in the beginning, it is designed so that you can't go beyond the beginner level. Therefore, it is recommended that you learn the mechanics of the game as much as possible and play without being fit in the beginning.
In the beginning, when the weapons are poor, it feels like an assassination game like Commandos, and it is possible to play with the feeling of another turn-based game only after acquiring some armor over time.
Also, it is possible to play against common sense, but I will not disclose it.